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【判断题】
( T )能耗制动是在运行中的电动机制动时,在任意两相中通以直流电,以获得大小和方向不变的恒定磁场,从而产生与电动机旋转方向相反的电磁转矩,以达到制动目的。A.
正确
B.
错误
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举一反三
【简答题】选出正确的单词或词组填空。 1. Mittens and __________ (mitt, mitts) are the same. 2. There are many __________ (peoples, people) at the restaurant. 3. He is a good __________ (sing, singer) 4. The TV is too loud. P...
【简答题】I felt rather tired during the talk and my mind soon began to _______________(slouch/ wander/ distract).
【单选题】听力原文：I felt rather tired after taking the exam. (4)
A.
You should see the film.
B.
You'd better have a rest.
C.
Don't be afraid.
D.
Go ahead.
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