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【简答题】
杂质半导体中多数载数量浓度取决于什么?少数载流子数量取决于什么?
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举一反三
【简答题】It has been proved that the geodesic dome is ______ human shelter.
【单选题】It has been proved________violence on television has a bad effect on the development of children. [ ]
A.
whether
B.
because
C.
when
D.
that
【单选题】It has been proved _______ violence on television has a bad effect on children.
A.
whether
B.
because
C.
what
D.
that
【单选题】Nothing that he suggested _____ to be of any use.
A.
prove
B.
proved
C.
proving
D.
has been proved
【单选题】One is not guilty until he ______.
A.
has proved
B.
has been proved
C.
is proved
D.
will be proved
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