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【简答题】
二极管常用的半导体材料有硅、锗,如果二极管的正向导通压降是0.6V,该二极管为__________材料;如果二极管的正向导通压降是0.2V,该二极管为__________材料。
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举一反三
【单选题】下列与“埃克森·瓦尔迪兹( Exxon Valdez)”号油船油污染事件直接有关的是 。
A.
《SOLAS公约》
B.
《MARPOL公约》
C.
《ISM规则》
D.
美国《1990油污法》
【单选题】After the author made the phone call, ______ .
A.
they forgave the stockbroker
B.
they failed to get the check
C.
they went to New York immediately
D.
they spoke to their boss at once
【简答题】采用下图发酵罐进行实罐 灭菌, 预热后,蒸汽直接引入罐内,从 、 、 和 排出罐外(填数字)。
【单选题】What is Luis doing after the phone call?
A.
He's working at the office.
B.
He's having a snack with Kate.
C.
He's taking a break from work.
【简答题】采用下图发酵罐进行实罐 灭菌, 预热后,蒸汽直接 从 、 和 引入罐内 (填数字)。
【简答题】Smoking in indoor public places including public working places, public transport vehicles and some other special outdoor working places has been banned(禁止)in China since January 2011.Let’s look at th...
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