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【简答题】
绝缘栅双极型晶体管是以 作为栅极,以 复合而成。
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【简答题】某质点做匀变速直线运动,位移方程为 s=10t-2 t 2 ( m ),则该物体运动的初速度为 ______ ,加速度为 ______ , 4s 内位移为 ______
【单选题】It has been made __________ public that anyone who does harm to the environment in __________ public places will be blamed by __________ public.
A.
the, the, the
B.
/;the; the
C.
/; /; the
D.
the; /; the
【简答题】若某种材料允许的切削速度为v 15 =150m/min，其含义是什么?
【单选题】In this country it is required that anyone who has recently come here ______ taxes.
A.
will have to pay
B.
would have to pay
C.
have to pay
D.
has to pay
【单选题】Never before (I have) seen anyone (who has) the skill (John has) when he (repairs) cars.
A.
I have
B.
who has
C.
John has
D.
repairs
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