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		<h1>Bài tập trắc nghiệm Vật lý lớp 10 bài 5&#x3A; Chuyển động tròn đều</h1>
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			Bài tập trắc nghiệm Vật lý lớp 10 bài 5: Chuyển động tròn đều
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			<div style="text-align: justify;"><strong><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">1. Chọn câu đúng.</span></span></span></strong><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. Chuyển động tròn đều khi chất điểm đi được hai cung tròn có độ dài bằng nhau trong hai khoảng thời gian bằng nhau</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. Vectơ vận tốc trong chuyển động tròn đều có chiều không đổi.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. Tốc độ góc là thương số của góc quét ∆</span></span></span><img alt="" height="25" src="https://sachgiai.com/uploads/news/2019_06/image-20190616224352-8.png" width="13" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;và thời gian ∆t.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. Trong chuyện động tròn đều, vectơ gia tốc trùng với phương tiếp tuyến quỹ đạo.</span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>2. Chọn công thức sai.</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A.V = &nbsp;</span></span></span><img alt="" height="35" src="https://sachgiai.com/uploads/news/2019_06/image-20190616224352-9.png" width="15" /><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. T = </span></span></span><img alt="" height="35" src="https://sachgiai.com/uploads/news/2019_06/image-20190616224352-10.png" width="23" /><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C.<i><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;"> </span></i></span></span></span><img alt="" height="33" src="https://sachgiai.com/uploads/news/2019_06/image-20190616224352-11.png" width="54" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. </span></span></span><img alt="" height="25" src="https://sachgiai.com/uploads/news/2019_06/image-20190616224352-12.png" width="49" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;</span></span></span><img alt="" height="38" src="https://sachgiai.com/uploads/news/2019_06/image-20190616224352-13.png" width="17" /><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>3. Chọn câu đúng</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. Với cùng bán kính quĩ đạo, tốc độ góc càng lớn gia tốc hướng tâm càng nhỏ.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. Hai chuyển động tròn đều có cùng tốc độ dài, bán kính quĩ đạo càng lớn chu kì càng nhỏ.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. Hai chuyển động tròn đều có cùng tốc độ dài, bán kính quỹ đạo càng lớn tốc độ góc càng nhỏ.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. Chu kì và tần số tỉ lệ thuận với nhau.</span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>4. Một vệ tinh nhân tạo bay tròn đều quanh trái đất với vận tốc v = 8km/s và cách mặt đất khoảng h = 600km. Biết bán kính trái đất là R = 6400km. Chu kì quay của vệ tinh là:</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. 1h 31 phút 35s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. 2h 05 phút 10s</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. 2h 56 phút 13s</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. 3h 14 phút</span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>5. Một ôtô đang chuyển động thẳng đều với vận tốc v = 72km/h. Bán kính bánh xe là R = 25cm. Gia tốc hướng tâm tại một điểm trên bánh xe là bao nhiêu?</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. 1200m/s<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. 1600m/s<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. 1800m/s<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. 2000m/s<sup>2</sup></span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>6. Một bánh xe, quay đều với tốc độ góc 5 vòng/s. Bán kính bánh xe là 30cm. Tốc độ dài của một điểm trên bánh xe là bao nhiêu?</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. 3,45m/s&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. 5,67m/s&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. 7,32m/s&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. 9,42m/s</span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>7. Một đĩa tròn có bán kính R = 20cm quay đều với chu kì T = 0,2s. Tốc độ dài của một điểm trên vành đĩa là bao nhiêu?</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. 6,28m/s&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. 7,50m/s&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. 8,66m/s&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. 9,42m/s</span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>8. Một đồng hồ có kim phút dài R<sub>1</sub> = 8cm, kim giờ dài R<sub>2</sub> = 6cm. Coi chuyển động của các đầu kim là chuyển động tròn đều. Tốc độ dài của đầu kim phút lớn hơn đầu kim giờ bao nhiêu lần?</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. 2 lần&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. 5 lần</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. 11 lần</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. 16 lần</span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>9. Bánh xe co bán kính 50cm. Xe đi được 50m sau 10s chuyển động thẳng đều. Tốc độ góc của bánh xe là:</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. 8 rad/s&nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. 10 rad/s .</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. 12 rad/s</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. 15 rad/s</span></span></span><br  />
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<strong><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">10. Một sợi dây không dãn dài </span></span></span><img alt="" height="27" src="https://sachgiai.com/uploads/news/2019_06/image-20190616224352-14.png" width="20" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">= 1m, một đầu giữ cố định cách mặt đất 25m còn đầu kia buộc vào viên bi. Cho viên bi quay tròn đều trong mặt phẳng thẳng đứng với tốc độ góc <span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">⍵</span> = 20 rad/s. Khi dây nằm ngang và vật đi xuống thì dây đứt. Lấy g = 10m/s . Thời gian để viên bi chạm đất kể từ lúc dây đứt và vận tốc bi lúc chạm đất là:</span></span></span></strong><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. t = 0,5s và v = 36m/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. t = 0,8s và v = 36m/s</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. t = 1,0s và v = 30m/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. t = l,5s và v = 10m/s</span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>11. Coi rằng mặt trăng chuyển động tròn đều xung quanh tâm trái đất với bán kính r = 3,84.10<sup>8</sup>m, chu kì quay là T = 27,32 ngày.&nbsp;</b></span></span></span><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>Gia tốc hướng tâm của mặt trăng là:</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. 2,7.10<sup>-3</sup>m/s<sup>2</sup> &nbsp;&nbsp;&nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">B. 3,2.10<sup>-2</sup>m/s<sup>2</sup></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C. 0,15m/s<sup>2</sup></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">D. 4,6m/s<sup>2</sup>.</span></span></span>
<div style="text-align: center;"><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>ĐÁP ÁN</b></span></span></span></div>

<table class="MsoTableGrid" style="border-collapse:collapse;border:1pt solid black;width:100%;">
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			<td style="border: 1pt solid black; width: 40.45pt; padding: 0cm 5.4pt; text-align: center;" valign="top" width="54"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">CÂU</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.8pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">1</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.75pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">2</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.75pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">3</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.75pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">4</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.75pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">5</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.75pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">6</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.75pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">7</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.75pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">8</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 26.75pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">9</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 28.55pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="38"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">10</span></span></span></strong></td>
			<td style="border-top: 1pt solid black; border-right: 1pt solid black; border-bottom: 1pt solid black; border-image: initial; width: 28.55pt; border-left: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="38"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">11</span></span></span></strong></td>
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			<td style="border-right: 1pt solid black; border-bottom: 1pt solid black; border-left: 1pt solid black; border-image: initial; width: 40.45pt; border-top: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="54"><strong><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">ĐÁP ÁN</span></span></span></strong></td>
			<td style="border-bottom: 1pt solid black; width: 26.8pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">C</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 26.75pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">D</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 26.75pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">C</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 26.75pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">A</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 26.75pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">B</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 26.75pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">D</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 26.75pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">A</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 26.75pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">D</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 26.75pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="36"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">B</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 28.55pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="38"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">C</span></span></span></td>
			<td style="border-bottom: 1pt solid black; width: 28.55pt; border-top: none; border-left: none; border-right: 1pt solid black; padding: 0cm 5.4pt; text-align: center;" valign="top" width="38"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">A</span></span></span></td>
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