【单选题】一阶RC串联电路,R=20Ω、C=50μF的串联电路中时间常数为_____。
【简答题】Complete the following sentences with the expressions given below. Change the form if necessary. go through be supposed to grow into put out end up 1 .The firefighters tried to_____a...
【简答题】Fill in the blanks with words or expressions from the boxes. optimistic pessimistic figure out rush directions favor commute pollution dress up sightseeing 1.I keep ...
【简答题】go to press, provide...with, go to extremes, find out, set out, fail to, fire, lead to 1.When he drinks, he drinks too much. When he drives a car, he drives too fast. He always___...
【判断题】( )设一点处于非零应力状态,但三个主应力之和为零时,表明单元体的体积不变,而其形状将发生变化。
【简答题】Leyan and Rupert took ________ in a charity marathon.2.Beatta turned ________ the invitation to go out for a meal after work because she was very tired.3.We always take visitors ________ for an expens...
【简答题】Complete the following sentences with the expressions given below.Change the form if necessary. ( 用 给出的 短语完成下列句子。 根据语法规则要求,某些短语的形式需要改变。 ) go through be supposed to grow into put out end up 1. The fire...