该图为社会发展不同时期的人口迁移规模示意图, ①为城市间人口迁移, ②为城乡间人

题型:选择题

问题:

该图为社会发展不同时期的人口迁移规模示意图,

①为城市间人口迁移,

②为城乡间人口迁移

③为开拓式人口迁移(与土地扩张相伴的人口迁移)。读图回答问题。

小题1:人口迁移类型与其主要成因的正确组合是

A.①—耕地面积的变化

B.②—经济全球化

C.②—城乡经济差异

D.③—城市环境污染日益严重小题2:目前发达国家人口迁移规模特征处于

A.甲时期

B.乙时期

C.丙时期

D.丁时期

考点:影响人口迁移的因素人口迁移的概念及分类人口迁移方向对环境的影响
题型:选择题

根据短文内容完成任务

Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big, and they can eat small animals. One famous meat-eating plant is the Venus flytrap.

The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. (A) They can open and close very quickly. Inside the leaves, there are three small hairs. If an insect touches one of the hairs, the leaf closes quickly. The insect cannot get out. In about half an hour, the leaf presses(挤压) the insect until it is dead. Then, the plant covers the insect with a special liquid (液体). Slowly, the plant eats the insect.

(B) Plants are living things that have leaves and roots and grow in earth. Most of them get energy from the sun, the air, and the ground. In some places, the ground is very poor. It doesn’t have all the important things that plants need, especially nitrogen (氮). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let’s hope that some of the bigger plants don’t get the same idea!

小题1:Can plants get energy from the air?

小题2:Why is Venus flytrap a famous piant?

小题3:In some places, why do some plants get energy from animal meat?

小题4:写出(A)处划线单词they所指代的名词。

小题5:将(B)处划线句子改为两个简单句。

Plants are living things.   ______________________________

题型:选择题

吸入溴化异丙托品作用于什么受体扩张支气管()

A.兴奋β2肾上腺素受体

B.拮抗白三烯受体

C.拮抗M胆碱受体

D.拮抗组胺H1受体

E.拮抗β肾上腺素和组胺H1受体

题型:选择题

()是指有机化合物在高温下分子发生分解的反应过程。

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设立慈善组织,应当向县级以上人民政府民政部门申请登记,民政部门应当自受理申请之日起()内作出决定。

A.15日

B.30日

C.60日

D.90日

题型:选择题

修堤时应尽量采用(),以保证工程质量。

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