题目内容

【题目】读黄河水系图,回答后面的问题。

(1)黄河发源于 山脉,注入 海。

(2)序号②是 平原,河段④由于泥沙淤积,河床抬高,很容易形成“ ”。

(3)治理甲区域生态环境问题的根本措施是 ,山脉乙的走向是

(4)列举黄河上游的主要问题:

【答案】(1)巴颜喀拉 渤

(2)河套 地上河

(3)在中游黄土高原地区开展水土保持综合治理(言之有理即可) 东北至西南

(4)气候干旱,草场退化,荒漠化严重,凌汛。

【解析】(1)黄河发源于青藏高原的巴颜喀拉山,注入渤海。

(2)序号②是河套平原,黄河下游流经的地形区是华北平原,成为举世瞩目“地上河”,原因是黄河从中游黄土高原带来大量的泥沙进入下游,下游流速减慢,地势低平,泥沙堆积,河床抬高,成为举世瞩目的地上河。

(3)黄土高原地区最突出的生态问题就是水土流失,治理方法主要是植树种草,大力加强植被保护,保持水土。

(4)黄河上游,土地荒漠化严重,农业用水过多;中游水土流失严重;下游出现地上河,水旱灾害频发。

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【题目】A

Do you remember your dreams? Do people have the same dreams? Why do I dream?

There are many questions about dreams. We dream during the REM(快速眼动) stage of sleep. We have about five periods of REM sleep during the night. The first REM cycle(周期) lasts about 10 minutes. As the night goes on, the REM cycle gets longer. By early morning, the REM cycle can last up to 90 minutes. Usually, it is in this last REM cycle that we remember our dreams.

Dreams change as people age. People may have several dreams each night. Some are like films and usually in color. They come to us over and over again. That may be because the dreamer is worrying about something and trying to find the answer. Sometimes we wake up with a good feeling from a dream. But often we can’t remember the dreams clearly.

It is reported that too much dreaming is bad for our health. The more we sleep, the longer we dream. The mind is hard at work. That is why we may have a long sleep and still feel tired when we wake up.

Do you feel a little sleepy after lunch? Well, that’s normal. Your body naturally slows down then. What should you do about it? Don’t drink coffee, take a nap, instead. There are many advantages of a daily nap. First of all, you can remember things better and make fewer mistakes. Also, you can learn things more easily after taking a nap. A 20-minute nap can reduce your pressure. Finally, a nap can make you cheerful.

But, there are some simple rules you should follow about taking a nap. First, take a nap at noon, about eight hours after you wake up. In general, a 20-minute nap is the best. If you sleep longer, you may fall into a deep sleep. After waking up, you will feel worse. Also, you should set an alarm clock. That way, you can fully relax during the nap. You dont have to keep looking at the clock so that you don’t oversleep. Now, next time you feel sleepy after lunch, don’t get stressed. Put your head down, close your eyes and take a nap.

【1】According to the article, which of the following is true?

A. People always ask questions in their dreams.

B. People never dream in their last REM cycle.

C. The first REM cycle is the shortest of the five.

D. Its impossible for people to remember their dreams.

【2】According to the article, why do people sometimes have the same dream again and again?

A. Because they are worried about something.

B. Because they often watch interesting color films.

C. Because they want to remember the dream clearly.

D. Because other people ask them too many questions.

【3】The underlined word nap in Paragraph 5 most probably means ___________.

A. A long walk B. a kind of drink

C. a short sleep D. a deep sleep

【4】According to the article, which of the following is not an advantage of a daily nap?

A. We can run much faster.

B. We can learn things more easily.

C. We can become happier.

D. We can remember things better.

【5】 According to the article, which of the following is true?

A. Dreaming is harmful to our health.

B. The longer we dream, the better we sleep.

C. We should fall into a deep sleep after lunch.

D. Well feel better after a 20-minute nap at noon.

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