题目内容

Please read Para. 1 and answer the following question.What’s the research objective?

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Please read Para. 2 and answer the following question.According to the research, how does a heavy commitment to part-time work affect school performance?

According to Para. 3, is part-time work bound to affect school performance much? Why?

下列不能用来测位移的是（）传感器

A. 电阻式
B. 电容式
C. 压电式
D. 电感式

如将变面积电容式传感器接成差动形式，其灵敏度将（）。

A. 保持不变
B. 增大为原来的一倍
C. 减小一倍
D. 增大为原来的两倍