题目内容

【题目】读下图,完成下列问题。

【1】四条河流中结冰期最长的是(

A.a B.b C.c D.d

【2】四条河流中含沙量最大的是(

A.a B.b C.c D.d

【3】四条河流中,汛期最长的是(

A.a B.b C.c D.d

【答案】

【1】A

【2】B

【3】C

【解析】

试题分析:

【1】以秦岭-淮河线为界,以南地区的河流主要流经湿润地区,水量丰富,汛期长,含沙量小,冬季河流不结冰;以北地区的河流主要流经半湿润或半干旱地区,水量不大,汛期较短,且冬季河流有结冰现象。辽河、海河、黄河等河流流域内水土流失严重,河水含沙量很大。读图可知,a河的纬度最高,所处地区冬季气温较低,冬季结冰期最长。故选A

【2】以秦岭-淮河线为界,以南地区的河流主要流经湿润地区,水量丰富,汛期长,含沙量小,冬季河流不结冰;以北地区的河流主要流经半湿润或半干旱地区,水量不大,汛期较短,且冬季河流有结冰现象。辽河、海河、黄河等河流流域内水土流失严重,河水含沙量很大。读图可知,四条河流中,含沙量最大的是b河黄河。故选B

【3】中国外流河的水文特征深受季风气候影响。夏季风带来的雨水成为河流的主要水源,随着夏季风的加强,雨带由南向北推移,河流水量骤增,水位上涨,形成汛期。C珠江纬度最低,雨季最长,汛期最长。故选:C

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【题目】B

On Lunar New Years Eve on Feb 18, 2015, Beijing had a good day. PM2. 5 levels were below 50. However, the nice day ended with firework celebrations at night.

In the first hour after the start of the celebration, PM2. 5 levels rose to 500 in certain parts of the city, with the average across the city around 400.

According to the China National Environmental Monitoring Center, on Lunar New Years Day, air pollution reached dangerous levels in 201 Chinese cities, because of fireworks, with more than 40 of them seeing serious pollution. As a result, the debate on whether to ban (禁止) fireworks during the Spring Festival is also heating up.

Sina surveyed 3,000 Internet users, and results show that only 38 percent of the people support setting off fireworks, and 60 percent are against it.

I support a ban on fireworks, a netizen (网民) nicknamed ann019 said. Lighting fireworks can only bring problems: air pollution, disturbing sleep, causing fire and exhausting sanitation workers (环卫工人).

Others thought it to be hard to ban traditions, and lighting fireworks during holiday seasons wont cause lasting pollution.

Some, however, suggest a moderate (温和的) way to solve the problem.

As a tradition, fireworks absolutely add to the festivals happiness. They shouldnt be banned totally, commented netizen Tracy on the China Daily online forum (论坛). But the time /span>should be reduced. For example, it can be allowed just during New Years Eve, the first day of the Lunar New Year and the Lantern Festival.

【1】___________________ caused serious air pollution on Lunar New Years Eve.

A. The factories B. The cars

C. The fireworks D. The bad weather

【2】 ___________________ cities saw serious air pollution on Lunar New Years Day.

A. 201 B. More than 40

C. Around 400 D. 500

【3】According to Sinas survey, over half of the Internet users ___________________ setting off fireworks.

A. are against B. enjoy

C. support D. dont care about

【4】___________________ was not mentioned by the netizen nicknamed ann019.

A. Exhausting sanitation workers B. Disturbing sleep

C. Wasting money D. Causing fire

【5】According to the passage, we know ___________________ is a moderate way to solve the problem.

A. to ban fireworks totally

B. to reduce the time of setting off fireworks

C. to get more people to set off fireworks

D. to never change the tradition

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