题目内容

三极管正常工作(起放大作用)必须具备的两个外部条件是______ 。

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An explosion is a sudden increase in amount __________.

A. rapid burning causes it
B. to be caused by rapid burning
C. causing its burning to be rapi
D. caused by rapid burning

As __________ as you work hard and perform well, opportunities will be made available to you as the company succeeds and grows.

A. best
B. most
C. much
D. long

The general orders them all to be driven out at once, without __________.

A. failure
B. fail
C. failing
D. failed

She picked __________ a stone and threw it at the window.

A. on
B. for
C. up
D. at

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