汽轮发电机在启动升速过程中，没有临界共振现象发生的称为（）转子。
A、挠性；
B、刚性；
C、重型；
D、半挠性。
参考答案：B
看图，在句中空白处填上恰当的单词。
Robot: This is a picture of my room. There is a big table. There are white curtains. The closet is
the table. Many clothes are the closet. The trash bin is the door. The mirror is the
air-conditioner. What's the table? There is a computer. I work with it. Do you like my room?
热流计法双试件装置时，两个试件的冷板温差的差异不应大于（）。
A、1%
B、2%
C、3%
D、5%
