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【单选题】
Jenny _____in the chicken when you called her at 5 o’clock this afternoon?A.
is cooking
B.
was cooking
C.
cooks
D.
cooked
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举一反三
【单选题】He was easily hurt because his feelings were very ______.
A.
sensible
B.
sensational
C.
sensitive
D.
senseless
【简答题】From the first paragraph we can learn that ______. A) very few people have the sensitivity of the blind' B) blind people can manage to see things, but not clearly C) not everybody sees with his eyes D...
【单选题】在电动机正反转的控制线路中，为了保证正转和反转接触器不能同时工作，需要进行互锁保护。和正转接触器线圈串联的触点为：
A.
正转接触器的辅助触点
B.
正转接触器的主触点
C.
反转接触器的动合辅助触点
D.
反转接触器的动断辅助触点
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