题目内容
带传动是靠摩擦力工作的，因此带轮的工作表面越粗糙越好，张紧力越大越好。
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通用的闭式齿轮传动，当齿轮的圆周速度v≤10m/s时，常采用喷油润滑。
Here are a list of words and a passage with ten blanks. First, learn the words given. Then, try to put the most proper word for each blank in the passage. One blank one word.business immigrants dream grow saverecent rich modest engineering investThe American Dream used to go something like this: arrive in the country for an unskilled job with small pay. Save and (1)_______ until you can open a small business in (2)_______ years, a take-out restaurant or a dry cleaner. Buy a (3) _______ house in the suburbs. Send the children to college and hope they (4)_______ up to be doctors. In the past decade, that (5) _______ has changed.For many (6)_______ today, the new version of the dream goes more like this: arrive in America for a high-tech job with good pay, invest and invest until you can open your own (7)_______. Buy a huge house in an exclusive (高级的) suburb. And if you, don‘t have a(n) (8)_______ degree? Work like crazy, get a tech-related job and (9) _______ a large part of your wages into stocks until you --- don't wait for your kids --- are (10)_______.
装配式建筑具有（）优点。
工程总承包（EPC）可以实现设计、制作、装配一体化，有利于（）。
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