【多选题】工件的后表面放置两个约束点,又限制工件的哪几个自由度?
【简答题】阅读短文,判断句子正(T)误 (F)。 'Next Tuesday is going to be a holiday,' says the teacher,' I want you to tell me what you are going to do, Terra.' 'I'm going to the movie theatre to see a movie,' says Terra. 'It...
【简答题】请从A、B、C 三个句子中选出一个与你听到的句子的意义最接近的句子。每句念一遍。 ( )1. A. Tom is old enough to dress himself. B. Tom can dress himself, though he is young. C. Tom is so young that he can't dress himself. ( )2. A. Kat...
【简答题】阅读短文,判断正误(正确的写T,错误的写F)。 Imagine the year is 1666 and we can see a student called Isaac Newton. He's away from his university for a holiday and at home with his family. Isaac Newton continues to study ...
【单选题】在使用绩效考评的关键事件法时,下列说法正确的是()