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【单选题】
核酸对紫外吸收的最大吸收峰在哪一波长附近
A.
240nm
B.
260nm
C.
280nm
D.
570nm
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【多选题】影响电阻的因素有( )
A.
元件材料
B.
几何尺寸
C.
温度
D.
元件软硬强度
【多选题】影响金属电阻的因素有:
A.
温度
B.
尺寸
C.
电阻率
D.
延伸率
【单选题】影响电阻大小的因素有( )。
A.
导体的电阻率
B.
导体的长度
C.
导体的横截面积
D.
以上答案都是
【单选题】To achieve success in your career, the most important factor, according to the passage, is to ______.
A.
let your superiors know how good you are
B.
project a favorable image to the people around you
C.
work as a consultant to your superiors
D.
perform. well your tasks given by your superiors
【判断题】示波管中的电子透镜是由聚焦阳极和前加速阳极组成的。( )
A.
正确
B.
错误
【简答题】According to the passage, the result of adjusting your body clock too frequently is ______.
【简答题】醛酮与含氮亲核试剂发生加成反应后,通常会再发生一个什么反应?
【多选题】影响电阻大小的因素有()
A.
电压
B.
温度
C.
材料长度
D.
材料横截面积
【简答题】影响电阻值的因素有:
【单选题】To achieve success in your career, the most important factor, according to the passage, is to ______.
A.
let your superiors know how good you are
B.
work as a consultant to your superiors
C.
perform. well your tasks given by your superiors
D.
project a favourable image to the people around you
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