| Astronaut Jim Voss has enjoyed many
memorable moments in his career, including three space flights and one space
walk. But he recalls with special fondness a decidedly earthbound (为地球引力所束缚的)
experience in the summer of 1980, when he participated in the NASA-ASEE Summer
Faculty Fellowship Program. Voss, then a science teacher at West Point, was
assigned to the Marshall Space Flight Center’s propulsion (推进) lab in Alabama to
analyze why a hydraulic fuel pump seal on the space shuttle was working so well
when previous seals had failed. It was a seemingly tiny problem among the vast
complexities of running the space program. Yet it was important to NASA because
any crack in the seal could have led to destructive results for the astronauts
who relied on them. "I worked a bit with NASA engineers," says Voss, "but I did it mostly by analysis". I used a handheld A. Because previous seals all failed. B. Because it was very complex in running the space program. C. Because great care has to be taken of the hydraulic fuel pump sealing. D. Because any crack in the seals would cause disastrous results for the astronauts. [单项选择]There has been a huge ______ over where to put the city's new sports stadium and who should build it.
A. deviation B. disorder C. controversy D. contradiction [单项选择]Vitamins necessary in small amounts in the diet for the normal growth and maintenance of are needed for______ foods into energy and body maintenance.
A. shifting B. transferring C. altering D. transforming [单项选择]It can be inferred that proper amounts of iodine, fluoride and calcium can ______.
[单选题] MOA带电测试谐波含量偏大时,会使测得的阻性电流峰值数据不真实,而()是一个比较稳定的值。
A. 阻性电流基波峰值 B. 全电流 C. 谐波含量 D. 全电流 [单项选择]7MO属于（）
A. Ⅰ类洞 B. Ⅱ类洞 C. Ⅲ类洞 D. Ⅳ类洞 E. Ⅴ类洞 [单项选择]Many imprudent companies suffered a huge loss from the past boom-and-bust cycles because ______.
[单项选择]Huge losses on the stock market did many investors ______.
A. in B. for C. without D. with [单项选择]
Soft money is the huge, unlimited contributions from corporations, labor union and wealthy individuals that political parties raise and spend on campaign attack ads and other (1) designed to influence elections. The soft money system undermines campaign finance laws (2) limit contributions and (3) the sources of funds that can be spent on federal campaigns. It provides corporations, labor unions, and wealthy individuals a way to circumvent federal election laws and (4) campaigns with tens of millions of special interest dollars, (5) corporations and unions have been (6) from contributing or spending their treasury finds to influence federal elections since 1907 and 1947, (7) . Individuals can contribute to federal (8) through parties and candidates, but only in (9) amounts. 我来回答: 提交
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