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【简答题】
电容器上所标明的电容量叫_________,使用电解电容器时切不可将__________________。
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【简答题】软件危机出现于60年代末，为了解决软件危机，人们提出了【 】的原理来设计软件，这就是后期软件设计的基础。
【简答题】软件危机出现于60年代末，为了解决软件危机，人们提出了 【3】 的原理来设计软件，这就是软件工程诞生的基础。
【简答题】软件危机出现于20时纪60年代末，为了解决软件危机，人们提出了( )的原理来设计软件，这就是软件工程诞生的基础。
【简答题】B There are some places in the world where great cities once stood.There were gardens,trees and grass.But now these cities have gone and the places are like deserts.Scientists began to study this land...
【单选题】More engineers and scientists ____ to the African countries next yea r.
A.
will send
B.
will be sent
C.
sent
D.
were sent
【单选题】Many leading scientists down through the years from Galileo to Einstein have been deeply religious. They have been intrigued by the essential mystery of life and material existence, and have recognize...
A.
have acknowledged that only religion can explain the mystery of life
B.
have been puzzled by the mystery of life and material things
C.
have attempted to explain physical life from a religious point of view
D.
have been so intrigued as to make great efforts to solve the mystery of life
【简答题】'The world's oceans are slowly getting more acidic．”say scientists．The researchers from California report that the change is taking place in response to higher levels of carbon dioxide in the atmosphe...
【单选题】All scientists follow the same basic research principles as they pose questions, conside r possible answers, and ______ .
A.
gathering evidence
B.
evidence is gathered
C.
gather evidence
D.
with gathering evidence
【简答题】软件危机出现于60年代末，为了解决软件危机，入们提出了【 】的原理来设计软件，这就是软件工程诞生的基础。
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