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【单选题】
通常情况下,绝缘体、半导体和金属三者之中,禁带宽度最大的是()A.
绝缘体
B.
半导体
C.
金属
D.
一样大
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举一反三
【单选题】We have done things we ought not to have done and______ undone things we ought to have done.
A.
leave
B.
leaving
C.
left
D.
will leave
【单选题】What a pity ! Considering his ability and experience , he ____better. A . need have done B.must have done C. can have done D . might have done
A.
A . need have done
B.
must have done
C.
can have done
D.
D . might have done
【简答题】All that can be done _____. [ ] a. has done b. has been done c. have done d. have been done
【简答题】We have done things we ought not to have done and ________ undone things we ought to have done. A) leaving B) will leave C) left D) leave
【简答题】在“体检中心”页面,可以很醒目的看到目前店铺急需处理的()()()和待跟进申诉等。
【单选题】We have done things we ought not to have done and ________ undone things we oughtto have done.
A.
left
B.
leave
C.
willleave
D.
leaving
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