题目内容

【题目】下列河流中,注入北冰洋的是(  )

A.额尔齐斯河B.怒江

C.黑龙江D.长江

【答案】A

【解析】

根据中国外流区面积610多万平方千米,约占全国陆地总面积的64%;内流区面积约占全国陆地总面积的36%;中国绝大多数河流分布在外流区,外流河年径流总量占全国的95%以上,内流河年径流总量不足5%,进行分析解答。

河流是地形和气候的产物。我国受地势的影响大部分河流滚滚东流,如长江、黄河自西向东注入太平洋;只有西南部的雅鲁藏布江和怒江转向西南注入印度洋,新疆北部的额尔齐斯河流向北穿越中亚北亚最后注入北冰洋,也是我国唯一一条注入北冰洋的河流。故选:A

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【题目】

You must think a computer is the best thing in the world, right? You must think it works at a super speed and can do everything? Well, it's not! In fact, the brain is much more powerful than any super computer! Think about when a glass is just about to fall off the table. Your brain controls everything that you need to do to save that glass from falling. First your eyes check out what's going on, then tell your brain, and your brain decides how quickly you need to react(反应), and then your muscles(肌肉) go into action. That is just from your brain. No computer could ever come close to that!

The brain weighs just 3 pounds, but it controls everything you do from thinking, learning, feeling even to breathing and your heart beating. Even though the brain is just 2% of your body weight, it uses around 20% of all your energy in your body. That is a lot for such a small organ(器官). There are about 100 billion tiny, tiny little cells(细胞) in your brain. There are so many that it would take you over 3, 000 years to count them all!

Your brain stops growing when you're 18, but it actually keeps on developing and learning new things. So your parents are really super smart! You won't be able to fool them! Believe it or not, your brain NEVER stops working. Even during sleeping, the brain works for longterm memory establishment. It is realized that the brain is the second organ in the body as the heart that never stops during human lives.

So everyone should be proud of such a gift of nature.

1From the first paragraph we know that ________.

A.eyes and muscles react quickly

B.the brain controls everything in your body

C.the computer is the best thing in the world

D.the brain is more powerful than any computer

2Which of the following is TRUE according to the passage?

A.The brain doesn't work during sleeping.

B.The brain is the only organ that never stops.

C.The brain keeps growing during human lives.

D.The brain keeps on developing during human lives.

3In which magazine can the passage be found most probably?

A.Business WeeklyB.MedicineC.ScienceD.Sports

4The underlined word“establishment”in the passage means“________” in Chinese.

A.储存B.形成C.空缺D.建立

5The best title for this passage is “________”

A.A Powerful Organ—Human Brain

B.How Computers Work

C.Scientists' Research

D.Human Being's Activities

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