李白曾用“飞流直下三千尺,疑是银河落九天”的诗句描述庐山瀑布的壮观.从物理学的角

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问题:

李白曾用“飞流直下三千尺,疑是银河落九天”的诗句描述庐山瀑布的壮观.从物理学的角度来看,飞流直下的瀑布蕴藏着巨大的 ______.

考点:机械能与其他形式能量的转化
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川端康成说:“美是邂逅所得,亲近所得。”每个人最最熟悉的,应该莫过于自己的父母亲。忽然有一天,一两件其实也并不算是太大的生活琐事,才让我们对自己的父母的爱有了真正的理解,对亲情有了一份真切的感悟。

请以“阅读父亲(或母亲)”为话题,写一篇文章,通过一两件事情,写出你对“父爱(或母爱)”的感悟。

要求:①题目自拟;②要有真情实感;③不少于800字;④注意标点符号的正确使用。

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在实现物流合理化的途径中,商物分离化是( )中物流合理化的途径之一。

A.生产活动

B.供应活动

C.销售活动

D.采购活动

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My family and I lived across the street from Southway Park since I was four years old. Then just last year the city put a chain link fence around the park and started bulldozing (用推土机推平) the trees and grass to make way for a new apartment complex. When I saw the fence and bulldozers, I asked myself, “Why don't they just leave it alone?”       

Looking back, I think what sentenced the park to oblivion (被遗忘) was the drought (旱灾) we had about four years ago. Up until then, Southway Park was a nice green park with plenty of trees and a public swimming pool. My friends and I rollerskated on the sidewalks, climbed the trees, and swam in the pool all the years I was growing up. The park was almost like my own yard. Then the summer I was fifteen the drought came and things changed.

There had been almost no rain at all that year. The city stopped watering the park grass. Within a few weeks I found myself living across the street from a huge brown desert. Leaves fell off the park trees, and pretty soon the trees started dying, too. Next, the park swimming pool was closed. The city cut down on the work force that kept the park, and pretty soon it just got too ugly and dirty to enjoy anymore.

As the drought lasted into the fall, the park got worse every month. The rubbish piled up or blew across the brown grass. Soon the only people in the park were beggars and other people down on their luck. People said drugs were being sold or traded there now. The park had gotten scary, and my mother told us kids not to go there anymore.      

The drought finally ended and things seemed to get back to normal, that is, everything but the park. It had gotten into such bad shape that the city just let it stay that way. Then about six months ago I heard that the city was going to “redevelop” certain worn-out areas of the city. It turned out that the city had planned to get rid of the park, sell the land and let someone build rows of apartment buildings on it.

The chain-link fencing and the bulldozers did their work.  Now we live across the street from six rows of apartment buildings. Each of them is three units high and stretches a block in each direction. The neighborhood has changed without the park. The streets I used to play in are jammed with cars now. Things will never be the same again. Sometimes I wonder, though, what changes another drought would make in the way things are today.

1. How did the writer feel when he saw the fence and bulldozers.'?

A.Scared.             B. Confused.        C. Upset.       D. Curious.

2. Why was the writer told not to go to the park by his mother?

A.It was being rebuilt.                         B. It was dangerous.

C. It became crowded.                            D. It had turned into a desert.

3. According to the writer, what eventually brought about the disappearance of the park?

A. The drought.                                   B. The crime.

C. The beggars and the rubbish.                   D. The decisions of the city.

4. The last sentence of the passage implies that if another drought came,         .

A. the situation would be much worse

B. people would have to desert their homes

C. the city would be fully prepared in advance

D. the city would have to redevelop the neighborhood

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喉镜显露声门时,下列哪项错误()。

 

A.根据解剖标志循序推进喉镜

B.显露声门的操作要迅速准确,轻柔

C.麻醉转浅时应重新加深

D.将上门齿作为支点显露声门

E.上提喉镜显露声门

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稻田杂草的发生与分布

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