题目内容

【题目】我国第六次人口普查(2010年)数据显示,离开户口登记地在居住地居住半年以上的人口为26 139万人,比2000年增11700万人;东部沿海地区的人口占全国总人口的比重上升。据此完成下列各题。
(1)所给材料反映出的现象是( )
A.我国人口流动规模扩大
B.我国中、西部地区人口数量减少
C.我国人口空间分布趋于均匀
D.我国沿海地区人口自然增长率升高
(2)出现该现象的主要原因是( )
A.中、西部发展政策的吸引
B.人们的生育观念改变
C.地区经济发展水平的差异
D.人均耕地减少

【答案】
(1)A
(2)C
【解析】(1)在居住地居住半年以上的人口为迁移人口,所给材料反映出的现象是我国人口流动规模扩大,A对。我国中部地区人口数量减少,受西部大开发政策影响,西部人口也增加,B错。我国人口空间分布不均匀,C错。我国沿海地区人口自然增长率下降,机械增长率提高,D错。(2)人口迁移到东部沿海地区,主要是东部地区经济水平高,人们有更高的收入,更好的生活条件,所以出现该现象的主要原因是地区经济发展水平的差异 ,C对。人口迁移到东部,与中、西部发展政策的吸引无关,A错。与人们的生育观念改变无关,B错。该现象与人均耕地减少无关,D错。

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【题目】阅读理解
Along the river banks of the Amazon and the Orinoco there lives a bird that swims before it can fly,flies like a fat chicken,eats green leaves,has the stomach of a cow and has claws(爪)on its wings when young.They build their homes about 4.6m above the river,an important feature(特征)for the safety of the young.It is called the hoatzin.
In appearance,the birds of both sexes look very much alike with brown on the back and cream and red on the underside.The head is small,with a large set of feathers on the top,bright red eyes,and blue skin.Its nearest relatives are the common birds,cuckoos.Its most striking feature,though,is only found in the young.
Baby hoatzins have a claw on the leading edge of each wing and another at the end of each wing tip.Using these four claws,together with the beak(喙),they can climb about in the bushes,looking very much like primitive birds must have done.When the young hoatzins have learned to fly,they lose their claws.
During the drier months between December and March,hoatzins fly about the forest in groups of 20 to 30 birds, but in April,when the rainy season begins,they collect together in smaller living units of two to seven birds for producing purposes.
(1)What is the text mainly about?
A.Hoatzins in dry and rainy seasons.
B.The relatives and enemies of hoatzins.
C.Primitive birds and hoatzins of the Amazon.
D.The appearance and living habits of hoatzins.
(2)Young hoatzins are different from their parents in that.
A.they look like young cuckoos
B.they have claws on the wings
C.they eat a lot like a cow
D.they live on river banks
(3)What can we infer about primitive birds from the text?
A.They had claws to help them climb.
B.They could fly long distances.
C.They had four wings like hoatzins.
D.They had a head with long feathers on the top.
(4)Why do hoatzins collect together in smaller groups when the rainy season comes?
A.To find more food.
B.To keep themselves warm.
C.To protect themselves better.
D.To produce their young.

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