题目内容

晶闸管导通后,当阳极电流小于维持电流IH,晶闸管必然自行关断。()

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Flowers __________ to this room.

A.make no difference
B.make much of
C.make mention of
D.make light

由“读”过渡到“说”,训练学生能在较长时间连贯的、有条理的完整说话能力的训练方式是()

A.答问
B.讨论
C.口头作文
D.复述

We are working on the ________ that the rate of inflation will not increase next year.

A.consumption
B.assumption
C.resumption
D.aggregation

跨度是对臂架类型起重机而言的。()

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