电机车的两台电动机由串联过度到并联的电路控制方法有几种?

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问题:

电机车的两台电动机由串联过度到并联的电路控制方法有几种?

考点:煤矿电机车司机考试煤矿电机车司机考试题库
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( )弹簧铰链分单筒和双筒两种,均由铰链板、顶轴、调节杆和调节器组成。

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古代诗歌阅读。

溪居

柳宗元

久为簪组累,幸此南夷谪。

闲依农圃邻,偶似山林客。

晓更翻露草,夜榜响溪石。

来往不逢人,长歌楚天碧。 

  【注】① 元和五年,柳宗元在零陵西南游览时,发现了曾为冉氏所居的冉溪,因爱其风景秀丽,便迁居此地,并改名为愚溪。这首诗就是柳宗元贬官永州居住在冉溪之畔时写的作品,写的是他迁居愚溪时写的作品,写的是他迁居愚溪后的生活。②簪组:古代官吏的冠饰。③榜:用棍子或竹板子打。

1.这首诗的中间两联描述了怎样的场景?塑造了怎样的主人公形象?

答:____________________________________________________________________ 。

2.沈德潜在《唐诗别裁》中评价柳宗元的诗是“不怨而怨,怨而不怨,行间言外,时或遇之”,试结合诗句简要分析这一点。

答:____________________________________________________________________ 。

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July 21,2007 was a typical English summer’s day—it rained for 24 hours ! As usual, I rushed home from work at midday to check on the house. Nothing was amiss. By the time I left work at 5 pm, however, the road into our village was flooded. Our house had never been flooded, but as I opened the front door, a wave of water greeted me. Thank God the kids weren’t with me, because the house was 5 feet deep in water. We lost everything downstairs. And the plaster of the walls, ceilings pulled down.

At first we tried to push on through. We didn’t want to move the children out of home, so we camped upstairs. We put a sheet of plastic across the floor to protect us from the damp. But after three months, we felt very sick, so we moved to a wooden house in a park. The house was small, but at first we were all just delighted to be in a new place. Unfortunately, things took longer than expected and we were there for 10 months. The life there was inconvenient. What surprised me most was how much I missed being part of a community. We had lived in a friendly village with good neighbors, and I’d never thought how much I’d miss that.

Although our situation was very hard, it’s difficult to feel too sorry for yourself when you look at what’s happening elsewhere. I watched a news report about floods in Northern India and thought, "We didn’t have a straw but that was swept away, and our house is still standing. We’re lucky. "

We moved back home in August. With December coming, there’s still reconstruction work to be done, so it’s difficult to prepare for Christmas. But I can’t wait—I’m going to throw a party for our friends in the village to say thanks for their support. This year, I won’t need any gifts—living away from home for months has made me realize how little we actually need or miss all our possessions. Although we are replacing things, there’s really no rush—we have our home back, and that’s the main thing.

What does the author mainly want to express by telling her story()

A.She valued human feelings more than before.

B.She realized she almost didn’t need possessions.

C.She found Christmas gifts no longer badly needed.

D.She thought her own home was the most important.

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当小机器人“金字塔漫游者”吃力地沿着长约64米的“南通道”独自向上攀爬时,这段90分钟的孤独之旅显得格外漫长,一如这昏暗的甬道本身的寿命。“人畏惧时间,而时间畏惧金字塔”这句阿拉伯谚语的真意,在此刻突显无疑。

这段话意在强调()。

A.小机器人的攀爬过程非常缓慢

B.金字塔“南甬道”路况非常糟糕

C.阿拉伯人充分了解金字塔的特点

D.小机器人攀爬的金字塔历史悠久

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()是信号对杂音之比。

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