题目内容

A charge of fresh air is drawn into the engine cylinder and then () by the moving piston() very high pressure.

A. pressed;to
B. pressurized;with
C. pushed;in
D. compressed;to

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利用FrontPage或D、reamweaver制作网页时,如要设置背景图片,以下最合理的操作方法是()。

A. 先设置一下网页的背景颜色,再设置网页的背景图片
B. 只要设置一下背景图片
C. 先设置一下网页的背景图片,再设置网页的背景颜色
D. 以插入图片的方式将背景图片贴在网页上

某毛石条形基础,中心线长30m,基础底面宽1.2m,槽深1.2m,三类土,人工挖土方为()m3

A. 43.2
B. 54
C. 97.2
D. 86.4

The quality of EGC message is()affected by the position of the ship, the time of reception and climatic condition.

A. sometimes
B. all times
C. never
D. partly

为什么AD病多为杂合子?

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