Self-introduction is a monologue, in which you're not required to consider the emotion and responses of the audience.

下列关于比转数的叙述，错误的是( )。A.比转数大小可以反映叶轮的构造特点B.叶片泵可以根据比转数大小进行分...

单项选择题下列关于比转数的叙述，错误的是( )。

Listen to the sentence and repeat. Score your imitation...

多项选择题Listen to the sentence and repeat. Score your imitation in terms of the use of rhythm only. Tick the option that is close to your assessment of your own performance. Go back to the lectures for the sentences you still find difficult to produce. (听句子，并跟读句子。请评价自己的模仿——你的评价不影响你的得分。选择最接你对自己评价的分数。返回课程讲座，再次学习有困难的句子。)
It's very kind of you. u5-2.mp3
A、92
B、85
C、75
D、65

发电机转子穿装常用的方法不包括（ ）A.滑道式方法B.接轴的方法C.螺旋式方法D.用后轴承座作平衡重量的方法

单项选择题发电机转子穿装常用的方法不包括（ ）