题目内容

【题目】中国龙”﹣﹣﹣黄河哺育了灿烂的中华文明.但其身体上也存在许多病症,让我们把脉对症下药吧.读黄河图,完成下列问题。

【1】河源地区大量脱发的治理措施正确的是

A. 加高堤坝 B.疏浚河道 C.修建梯田 D. 建保护区

【2】河流中游地区“腹泻” 的原因不正确的是

A.降水减少 B.资源开发 C.过度放牧 D.植被破坏

【3】河流下游地区“脚肿” 治理的关键是

A.开挖河道 B.中游治沙 C.加固堤坝 D.修建水库

【答案】

【1】D

【2】A

【3】B

【解析】

试题分析:

【1】黄河上游地区气候趋于干旱,草场退化,荒漠化严重。正确的治理措施应该是建保护区,加强生态环境建设。故选D

【2】黄河流经黄土高原,带走大量泥沙。导致黄土高原水土流失严重的原因有自然原因,也有人为原因。不正确的是降水减少。故选A

【3】黄河中游流经黄土高原,由于水土流失严重,河流泥沙大增,下游在华北平原上,河床宽坦,水流缓慢,泥沙大量淤积,使河床抬高,成为举世闻名的地上河。所以,治理措施的关键就是在中游黄土高原地区开展水土保持综合治理。故选:B

练习册系列答案
相关题目

【题目】阅读理解

A city without cars would be very strange,right?But Venice(威尼斯)is such a city.

Venice is in the northeast of Italy.It wasn’t built on land,like Beijing or Shanghai,but on more than 110 islands.Seawater is everywhere around the city.

Even so,travel isn’t that difficult.The waterways have always been the best way to get around.There are 117 waterways and more than 400 bridges that can lead you where you want to go.

People in Venice move from place to place by boat.They like to enjoy the scenery and cool summer nights while taking boat trips.They can talk to other people as they go along.

Venice grew out of small islands in saltwater lakes when some Italians escaped from a war more than 1,500 years ago,and built homes there.

Water makes the city special,but it is also a big problem.

Once,people used too much underground water.This made the city get lower little by little.Now the city has gone down by 23 centimeters.

Another problem is the rising seawater.The temperature has risen over the years.This has made the ice of Arctic Ocean(北冰洋)melt(融化).

Every year,high waters hit the city in autumn and winter.When a lot of water comes,more than half of the city is underwater.

Scientists are trying different ways to stop the city from getting even lower.

【1】According to the article,which picture shows the right position(位置)of Venice?

A.

B.

C.

D.

【2】Which is the most impossible way for people in Venice to get around in the passage?

A.On foot.

B.By boat.

C.By car.

D.By bike.

【3】Why is Venice still getting lower and lower?

A.Because too many people live there.

B.Because people used too much underground water.

C.Because lots of bridges have been built.

D.Because the underground water is rising.

【4】What seasons are dangerous for Venice because of high waters?

A.Summer and autumn.

B.Autumn and winter.

C.Summer and winter.

D.Spring and winter.

【5】The article is mainly about________.

A.the position of Venice

B.the history of Venice

C.the problem of Venice

D.the scenery of Venice

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网