试题与答案

有一泵装置的已知条件如下:Q=0.12m3/s,吸水管直径D=0.25m,水温为40

题型:单项选择题

题目:

有一泵装置的已知条件如下:Q=0.12m3/s,吸水管直径D=0.25m,水温为40℃(密度为992kg/m3,汽化压力hv=0.75m),允许吸上真空高度Hs=6.2m,吸水面标高为1002m,水面压力ha=0.92m,吸入管段阻力为0.79m,求该泵的最大安装高度为()m。

A.1006.2

B.1003.46

C.1005.41

D.1003.79

答案:

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As a senior, my future is always on my mind. To be exact, thoughts of the future have kept me up countless nights and made me worry enough to do poorly on more than one test. Because of this, words of wisdom are a source of comfort. Steve Jobs gave a speech to Stanford’s graduating class in 2005 and his words resound repeatedly in my mind whenever I think about my future.

It wasn’t always like that, though. It started when I became a junior, when college came into view. It’s the first big step to making your life your own. So when Jobs discussed his life as a student, some fears were eased. He, too, felt the need to attend college to make something of himself. He faced what many are extremely afraid of: uncertainty. His lack of understanding caused him to stop attending college and focus on what he felt was important. His story had a happy ending, of course, since he certainly turned out well.

This doesn’t mean that students shouldn’t attend college, but rather that they shouldn’t worry so much. You’ll get where you need to go, even if your path is a bit more winding(蜿蜒的)than you’d like.

Jobs talked about the hardships in his work. His love of his work helped him carry on and he got where he was meant to be, which restates the point: don’t panic.

One particular part of his speech stayed with me. Steve Jobs quoted(引用)the saying “Stay hungry, stay foolish” and it has become my motto. Staying foolish is realizing that you are still a fool, no matter how much you’ve learned or experienced. There is always more to explore. Staying hungry is wanting to find those things about which you are still uneducated.

Steve Jobs’s level of success is attainable, and I aim to prove that. With the will power to go into the world living every day like it’s my last and allowing the future to take care of itself, I will do great things. In the last moments of my life, I’ll be proud of what I have done and hope to have all the wisdom a person could wish for.

小题1:The author felt worried when _________.

A.he had to take tests at school

B.he thought about his future

C.he had lots of sleepless nights

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A.Steve Jobs didn’t attend college

B.Steve Jobs failed because of his decision

C.the author is a college student

D.the author cares much about his future小题3:What did the author gain from Jobs’s speech?

A.Courage to drop out of school.

B.Confidence in defeating Jobs.

C.Interest in computer industry.

D.Bravery to face uncertainties.小题4:What did NOT Steve Jobs encourage students to do in his speech?

A.Have the desire to learn more.

B.Be content with what they know.

C.Stay calm in the face of hardships.

D.Be modest so as to learn more.小题5:The passage is mainly about _________.

A.the wisdom drawn from a speech

B.the most impressive quote in life

C.a memorable meeting with Jobs

D.an experience of a speech

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