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【单选题】
如图所示电路中,电源电压保持不变,闭合开关S,将滑动变阻器从中间向右移动,下列说法正确的是()
A.
2015年贵州黔西南州中考物理真题及答案,贵州省黔西南州2015年中考物理试卷 如图所示电路中,电源电压保持不变,闭合开关S,将滑动变阻器从中间向右移动,下列说法正确的是 A.灯泡变亮,电流表示数变大,电压表示数变小
B.
灯泡变亮,电流表示数变小,电压表示数不变
C.
灯泡变暗,电流表示数变小,电压表示数变大
D.
灯泡变暗,电流表示数变小,电压表示数不变
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DNA 重排
B.
碱基的缺失
C.
碱基的插入
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碱基的错配
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【单选题】造成镰刀形红细胞贫血的基因突变原因是()
A.
DNA重排
B.
碱基缺失
C.
碱基插入
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【单选题】造成镰刀形红细胞贫血的原因是()
A.
碱基缺失
B.
碱基错配
C.
碱基插入
D.
DNA重排
E.
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【单选题】造成镰刀形红细胞贫血的基因突变原因是
A.
DNA重排
B.
碱基缺失
C.
碱基插入
D.
碱基错配
【单选题】What are you up to?
A.
What are you doing?
B.
Where are you going?
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