水泵的闭闸启动和作用()A.水泵的闭闸启动就是指水泵的进口阀门关闭的情况下启动 B.

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问题:

水泵的闭闸启动和作用()

A.水泵的闭闸启动就是指水泵的进口阀门关闭的情况下启动

B.待水压、电流、真空正常后,再渐渐开启进口阀门

C.主要作用是为了防止压力小

D.回击在挡板处形成停泵水锤

考点:矿井泵工矿井泵工题库
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"I was just like you--I’ thought I was invincible," says Adam Blomberg, standing before 400 students in a darkened auditorium at Miami’s Coral Reef Senior High School. A photo of a bloodied and unconscious teenager, a breathing tube protruding from his mouth, flashes on the wall.

"That was me," he says. There’s a collective gasp before the room grows silent and Blomberg,31, an anesthesiologist who trained at Brigham and Women’s Hospital in Boston, begins the story of what happened one night in February 1995.

He created a presentation illustrating the dangers of behaving irresponsibly in a car, from not buckling up to speeding to driving under the influence of alcohol and drugs. He tracked down photos of teen crash victims from the center’s archives, then incorporated statistics and his own experience. He spoke the first time to a local Boy Scout troop and was soon giving his talk, "A Survivor’s Story," at high schools around the state.

The Blomberg family had reason to celebrate. Adam had fully recovered and was on his way to fulfilling his lifelong dream of becoming a doctor. But in January 2000, Blomberg’s 22-year-old step-brother, Michael, was killed in a crash while driving to his Atlanta home late one night. He wasn’t wearing a seat belt. After the accident, Blomberg stopped telling his story to crowds, racked with guilt over his inability to reach Michael. If Blomberg had failed his own brother, he reasoned, how could he possibly make a difference to a roomful of strangers Requests from schools continued to roll in, but he turned down every one.

Then Blomberg got a call from a high school counselor. As he started into his standard excuse-lack of time—he looked across the room at a stack of thank-you notes from students who had heard him speak. He realized that kids needed to hear what he had to say. He agreed to visit the school and began contacting others on the waiting list for his talks.

Blomberg leaves the school hoping he has changed someone’s behavior. He recalls a letter he received from a student who heard him speak and got into a crash later that same day but was unharmed. " She told me she was wearing her seat belt because of me."

Letters like this reinforce his belief that he survived the accident for a reason. "There are a lot of physicians in the world, and we all save lives," he says. "I have a special opportunity to save lives not just as a doctor but also as a human being.\

The word "invincible" most probably means ()

A. capable of doing everything

B. incapable of being destroyed

C. totally unlikely to happen

D. beyond belief or understanding

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关于双标记Schilling试验的叙述,错误的是()

A.对重度胰腺外分泌功能不足有意义

B.对碳酸氢盐分泌障碍的慢性胰腺炎有意义

C.其敏感性明显优于检测胰液中的胰蛋白酶

D.其敏感性与粪便脂肪吸收试验的大致相似

E.特异性比检测胰液中的胰蛋白酶和粪便脂肪吸收试验高

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《国务院关于加强市县政府依法行政的决定》中指出:“加强市县政府依法行政,事关巩固党的执政基础、深入贯彻落实科学发展观、构建社会主义和谐社会和加强政府壹身建设,必须把加强市县政府依法行政作为一项基础性、全局性工作,摆在更加突出的位置。”严格依法行政的目的是(   )

①维护人民权益                 ②树立政府威信,增强政府权威

③促进政府公正司法、严格执法   ④防止行 * * 力的滥用

A.①④

B.③④

C.②④

D.①②

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信息技术与课程整合广度则可以划分为()和整合型.

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关于债转股的操作流程,下列说法不正确的是( )。

A.可转债“债转股”通过交易所交易系统进行

B.“债转股”时,申报方向为买入

C.“债转股”时,转股申报不得撤单

D.可转债的买卖申报优先于转股申报

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