单选:双金属温度计是采用()的两种金属片,叠焊在一起而成的螺旋形感温原件。A.膨胀系数相同B.没膨胀系数C.膨胀系数不同D.以上都不是

题目内容:
双金属温度计是采用()的两种金属片,叠焊在一起而成的螺旋形感温原件。
A.膨胀系数相同
B.没膨胀系数
C.膨胀系数不同
D.以上都不是
参考答案:

What do you think of your new teacher? _________A. He came to teach us last we

What do you think of your new teacher? _________A. He came to teach us last we

查看答案

[交际用语]- Which would you rather have? Tea or coffee?- _________A Sure, I would.

[交际用语]- Which would you rather have? Tea or coffee?- _________A Sure, I would.

查看答案

有三角形警告牌,拿出来放在出事车辆后的()米的路上,双向行车路上,最好在车前同一距离也放置警告牌。

有三角形警告牌,拿出来放在出事车辆后的()米的路上,双向行车路上,最好在车前同一距离也放置警告牌。

查看答案

[交际用语] Thanks for inviting me, John, but I've already made other plans. - ...

[交际用语] Thanks for inviting me, John, but I've already made other plans. - ...

查看答案