题目:
气门组的功用是什么?其工作条件及对其的要求如何?
答案:
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下面是错误答案,用来干扰机器的。
参考答案:D
气门组的功用是什么?其工作条件及对其的要求如何?
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1014/a0abe02c41edf44822e7cfe60622cc19.html
下面是错误答案,用来干扰机器的。
参考答案:D
临床实验室管理过程中的“控制”就是()
A.改变资源,调整结构
B.审阅报表,统计报告
C.激励团队,促进业务
D.建立标准,改进工作
E.监督活动,纠正偏差
(C)
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 Poin,was assigned to the Marshall Space Flight Center's propulsion(推进) lab in Alabama to analyze why a hydraulic fuel pump seal (液压燃料泵的密封圈)on the space shuttle(航天飞机) 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 an analysis. I used a handheld calculator, not a computer, to do a thermodynamic(热力学的) analysis.” At the end of the summer,he,like the other NASA ASEE fellows working at Marshall,summarized his findings in a formal presentation and detailed paper. It was a valuable moment for Voss because the ASEE program gave him added understanding of NASA,deepened his desire to fly in space,and intensified his application for astronaut status.
It was not an easy process. Voss was actually passed over when he first applied for the astronaut program in 1978. Over the next nine years he reapplied repeatedly,and was finally accepted in 1987. Since then he has participated in three space missions. The 50 year old Army officer,who lives in Houston,is now in training for a four-month mission as a crew member on the International Space Station starting in July 2000.
Voss says the ASEE program is wonderful for all involved. “It brings in people from the academic world and gives NASA a special property for a particular period of time. It brings some fresh eyes and fresh ideas to NASA,and establishes a link with our colleges and universities,” Voss explains. “There's an exchange of information and an exchange of perspectives that is very important.”
For the academic side,Voss says,the ASEE program also “brings institutions of higher learning more insight into new technology. We give them an opportunity to work on real world problems and take it back to the classroom.”
66. Why was the hydraulic fuel pump seal important for the space shuttle?
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.
67.The great significance of Voss's findings lies in_________ .
A) strengthening his determination to join in space flights
B) furthering his understanding of NASA
C) consolidating his astronaut status in NASA programs
D) Both A and B
68. How many flights will Voss have finished if his four-month mission starting in July 2000 ends up successfully?
A) Three B) Two C) Four D) Five
69. Which of the following is NOT TRUE according to what Voss said on the ASEE program?
A) Fresh members from the academic world participate in the program.
B) The program brings new outlooks to NASA space programs.
C) It is important for the space scientists to exchange information and perspectives.
D) American colleges and universities are a special property of NASA.
70. What does Voss want to stress in the last paragraph?
A) The technological significance of the program.
B) The educational significance of the program.
C) The philosophical significance of the program.
D) The historical significance of the program.
基于ARM内核的嵌入式芯片中包含定时/计数组件,下面列出的哪一项不属于定时/计数组件?()
A.ADC
B.Timer
C.RTC
D.WDT
“官本位”是一种价值观,是以官职大小、行政级别高低作为衡量一个人的价值和社会地位,是一种将人生的终极追求和最大理想定位于追逐官职的文化。
杭州人喜爱苏轼的原因很多,下列哪一点不是?()
A、朝气冲力
B、不拘小节
C、大搞建设
D、关心民生