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【简答题】
请将下面句子翻译成汉语 試験前には10分の休憩時間すら惜しんで勉強したものだ。
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反馈参考答案：
举一反三
【单选题】You can buy these maps at _____ railway station. They all have them.
A.
any
B.
that
C.
this
D.
either
【简答题】在内陆和沿海地区无明显日变化的雾是:( )雾
【单选题】You can buy these maps at ---- station. They all have them.
A.
a lot of
B.
several
C.
some
D.
any
【单选题】Tokyo is one of the most confusing cities in the world. Over 20 million people live and work in the Tokyo area, and many famous companies have their offices there. But most streets don’t have names. S...
A.
ask a police officer for help.
B.
buy a map in a bookstore
C.
go into someone’s house and ask
D.
get someone to draw a map for you.
【单选题】关于pn结的热电击穿，下列说法正确的是：
A.
反向偏压增大时，反向电流损耗的功率也会增大，从而产生大量的热能。
B.
反向饱和电流密度随温度线性规律上升。
C.
禁带宽度较大的半导体，更容易发生热电击穿。
D.
反向电流密度的增大，对结温没有影响。
【单选题】You can buy these maps at railwaystation ． They all have them ．
A.
． that
B.
． any
C.
． every
D.
． each
【简答题】简述PN结反向击穿的原理（雪崩效应、齐纳击穿、热电击穿）
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