下面叙述正确的有（)。A．装配是指将合格的零部件和外购配套件、元器件按设计图纸的要求和装配工艺的下面叙述正确的有()。
A. 装配是指将合格的零部件和外购配套件、元器件按设计图纸的要求和装配工艺的规定进行配合、定位和连接,使它们装在一起并调整零部件之间的关系,使之形成具有规定技术性能的设备
B. 对零部件和设备涂防锈油脂或漆是为防止生锈和外形美观的需要
C. 包装是防止设备在运输、装卸和储存中受到损伤及丢失零部件和附件
D. 只有全部零部件都按计划合格地制造出来,才能进入装配工作
E. 生产技术准备阶段工作的关键是抓好生产速度和产品数量两点
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The influence of business in the U.S. is evidenced by the fact that ______.
A. most newspapers are run by big businesses
B. even public organizations concentrate on working for profits
C. Americans of all professions know how to do
D. even arts and entertainment are regarded as business
A．Because he is very happy.B．Because the woman gives him a present.C．Because this will
A. Because he is very happy.
Because the woman gives him a present.
C. Because this will be the first time for him to spend his Christmas in China.
D. Because he can go back to his country.
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