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【单选题】
不同的绝缘材料，其耐热能力不同。如果长时间在高于绝缘材料的耐热能力下运行，绝缘材料容易( )。A.
开裂;
B.
老化;
C.
破碎;
D.
无关。
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举一反三
【单选题】If you don't________smoking, I will________ your supply. [ ]
A.
cut up; cut down
B.
cut down; cut off
C.
cut in; cut off
D.
cut in; cut up
【单选题】Tony, mind your manners! Don’t _______ while others are talking.
A.
cut in
B.
cut off
C.
cut down
D.
cut up
【单选题】If you don’t pay your Internet fee on time, your line will be ________.
A.
cut off
B.
cut down
C.
cut in
D.
cut up
【单选题】Don’t_____so rudely while she is telling you what happened.
A.
cut out
B.
cut in
C.
cut off
D.
cut down
【单选题】The apple is too big. Why don’t you ________ first?
A.
cut up it
B.
cut it up
C.
cut it down
D.
cut them up
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