| 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 [多选题]安全管理应当遵循下列原则()
A.关口前移,源头治理 B.依法严管,科学监管 C.分级管控,各负其责 D.突出重点,精准防范 E.依靠群众,注重经常 [判断题]将闸阀阀门手轮逆时针（OPEN）方向转动，开启阀门。
A.正确 B.错误 [单选题]胞液的脂肪酸合成酶系催化合成的脂肪酸碳原子长度至：
A. 16 B. 18 C. 14 D. 12 E. 20 [判断题]某次事件,造成该市人民政府有关部门确定的二级重要电力用户电网侧供电全部中断,根据《国家电网有限公司安全事故调查规程》(国家电网安监〔2020〕820 号), 该起事件为六级电网事件。( )
A.正确 B.错误 [判断题]诚实守信是商业员工精神品质的基本准则，不是化工生产人员的道德规范。
A.正确 B.错误 [不定项选择]基金资产净值的复核指基金托管人以《证券投资基金法》、《证券投资基金会计核算办法》、《关于进一步规范证券投资基金估值业务的指导意见》等法律法规为依据，对基金管理人的估值结果即（）进行的核对。
A. 基金份额净值 B. 基金份额累计净值 C. 期初基金份额净值 D. 期末基金份额净值 [多选题]进入井、隧道、电缆夹层内工作前，应()，如有异常，应认真排除，在确认安全后方可进入工作。下坑井内工作的人员应()，救生绳上端固定在坑并上部牢固部位，并设专人监护。
A.先经工作负责人同意。 B.先检查其内是否积聚有可燃、有毒等气体。 C.系好救生绳和安全带。 D.穿好工作服。 [填空题]福禄倍尔强调以（）为课程，蒙台梭利强调以教具作为课程，都希望以此发展儿童的创造力和思想力。
[单项选择]柴胡疏肝散主治( )
A. 肝脾不和，气郁于内，脘腹诸痛及热厥 B. 肝气郁结较重，胁肋疼痛，胸脘胀满，寒热往来 C. 肝郁血虚，脾虚胃气不和，两胁作痛，神疲食少，舌淡红，脉弦而虚者 D. 肝气郁结之六郁 E. 肝肾阴虚，肝气不舒之胁痛、咽干口燥等证 [单项选择]The cylinder liners are made of （） and the cylinder surfaces are sometimes chromium-plated.
A. steel B. copper C. cast iron D. stainless steel 我来回答: 提交
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