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【简答题】
在本征半导体中掺入少量的五价元素,可以形成____ ,常用掺杂的五价元素有磷、砷和钨。
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举一反三
【单选题】If you could have bought a record, what ______?
A.
would you be buying
B.
would you have been bought
C.
would you buy
D.
would you have bought
【单选题】_____ you ever _____ America ? Yes, I have.
A.
Have…gone to
B.
Have…gone in
C.
Have…been to
D.
Have …been in
【简答题】短距离无线通信技术有:( )、( )、( )、( )、( )。
【简答题】目前最常见的短距离无线通信技术有 、 、 和 。
【简答题】常用的短距离无线通信技术有: 、 ZigBee 和 超宽带 。
【单选题】( ) 11. If you __________ me, you will have great benefits for yourself.
A.
believes
B.
will believe
C.
believe
D.
have believed
【单选题】—Have you seen the CCTV news on TV? —Yes，_________ children had a good festival on
A.
11． —Have you seen the CCTV news on TV? —Yes，_________ children had a good festival on the ________Children's Day． A． millions of sixty
B.
ten million sixty
C.
millions of sixtieth
D.
ten millions sixtieth
【单选题】. 11. ——The trade caused me $ 500 worth of loss. ——Had you listened to my advice,you would not have been__________.
A.
taken away
B.
taken off
C.
taken out D taken in
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