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【单选题】
Speakers must be confident. The best way to become confident is to:()A.
Take a course in it
B.
If you want confidence, act confident
C.
Study how to get it and make adequate preparation
D.
Seek advice from many about it
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【单选题】车右旋螺纹时,为了消除螺纹升角的影响,( )。
A.
精车刀的左侧切削刃的刃磨后角得比右侧切削刃的刃磨后角大些
B.
精车刀的左侧切削刃的刃磨后角得比右侧切削刃的刃磨后角小些
C.
精车刀的刃磨后角应磨得比粗车刀的小些
【单选题】The water behind the Three Gorges Dam (三峡大坝) should be _____higher than downstream (下游).
A.
sixty-five meter
B.
sixty-fifth meter
C.
sixty-five meters
D.
sixty-fifth meters
【简答题】AMC7135是什么样的芯片: (恒流、恒压)
【单选题】The water behind the Three Gor ges Dam should be ________ higher than down stream. [ ]
A.
sixty－five metre
B.
sixty－five－metre
C.
sixty－five metres
D.
sixty－five－metres