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问题 判断题

各轴承上均应装置测量出油温度的温度计，并在油管上设有视察窗，在轴承上还应装设遥测轴瓦温度的检温计（）

答案

参考答案：对

选择题
It is reported that many a new house _____ at present in the disaster area.

A. are being built
B. were being built
C. was being built
D. is being built
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选择题

某元素原子的质量数为A，它的阴离子Xn-核外有x个电子，w克这种元素的原子核内中子数为[ ]

A．

B．

C．

D．

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