给水泵站江水从水厂清水池输送到用户需要消耗一定的能量,若电动机与水泵采用联轴器直接传

题型:多项选择题

问题:

给水泵站江水从水厂清水池输送到用户需要消耗一定的能量,若电动机与水泵采用联轴器直接传动,无传动损失,则该过程的能量损失应包括()。

A.电源线损

B.电动机损耗

C.水泵损耗

D.管路损耗

考点:循环水操作工循环水操作工中级循环水操作工中级题库
题型:多项选择题

As a high school athletics coach, I gave a speech about football to students and parents, aiming at getting new team members :I talked  about how"everyone  can benefit from football. This year, a worried-looking couple approached me. Their son, who had a sickly childhood, really wanted to play football. They'd tried to talk him out of it, but he had his heart set on joining the team.

When they told me his name , my heart sank. Michael was short and thin. He was a lonely kid and the constant target of other kids' jokes. I knew Michael would never make it. But so close to my  "football is for everyone"  speech,  I told them we could give it a try.

On the opening day of practice, Michael was the first player on the field. We started a one-mile jog around the track. Repeatedly he fell, each time picking himself up. The same thing happened for weeks. But Michael put his whole heart into the training. Cradually, Michael gained strength both socially and physically. He began to laugh and most of the teammates became friendly. By the last week of practice Michael could run the mile without falling. He asked me to add a few more exercises he could work on his own. Soon ,  Michael ran the opening mile faster than anyone.

One day after practice, the team captain, Steve, came up to me. He was talented but lazy.He was popular with students even though he could be heartless. Steve pointed to the field where Michael was jogging all alone and asked me why he was still out there. I told Steve to ask him. The next night, I was surprised to see Steve exercising right next to Michael.

Finally our big game came-at first we were losing by twelve points. I could see that some kids  had already lost heart. But Michael was playing as hard as he could ,  begging the team to keep trying. Finally we won the game by one point in the final ten seconds.

At our celebration dinner, we always gave a big award to the most productive player. Steve had scored the most points that season,  and everyone cheered as he received his award. " There's someone who deserves it more than I do,"  Steve said,  " Everything I accomplished,  and everything the team accomplished this season, is thanks to one person-Michael. " The entire team cheered as Steve turned the prize over to the player who had inspired them all.

小题1:The author gave a speech to the students and parents in order to ____.

A.bring in new team members

B.teach them how to play football

C.tell them about the benefits of playing football

D.help those parents who are worried about their children小题2:How did the author react after the couple told him their son's name?

A.He was very excited about accepting Michael on the team.

B.He refused to accept Michael because he had no talent for sports.

C.He decided to accept Michael though he was unwilling to do so.

D.He agreed to accept Michael because he was moved by his determination.小题3: What happened to Michael after a few weeks' training?

A.He gave up training.

B.He began to laugh at others.

C.He often protected others in the football field.

D.He became strong both in friendly relations and in body.小题4: Which of the following can be the best title for the passage?

A.The Road to Success

B.Heart of a Champion

C.Steve, the Real Winner

D.A Player of Patience

题型:多项选择题

下列关于男性生殖系统的叙述,不正确的是(  )

①睾丸能产生精子和分泌黏液②参与受精的雄性生殖细胞是精子③男性主要的性器官是附睾④阴囊既能排精,又能排尿.

A.①②③

B.①③④

C.①②④

D.②③④

题型:多项选择题

硬脊膜外肿瘤()

A.早期很快出现完全性截瘫

B.感觉和运动障碍自下而上发展

C.感觉和运动障碍自上而下发展

D.明显而持久的感觉分离现象

E.交叉性感觉障碍

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习 * * * * 为纪念反法西斯战争胜利70周年,在《俄罗斯报》发表题为《铭记历史,开创未来》的署名文章,肯定了哪两位参加苏联卫国战争的湘籍英雄战士?

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外上线鞋坏为什么不应在雨天穿着?

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