人口过多对一个国家的经济发展会有阻碍作用，因此，人口最多的国_爱下问搜题

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问题选择题

人口过多对一个国家的经济发展会有阻碍作用，因此，人口最多的国家很难成为经济最发达的国家。请回答：世界上人口过亿的10个国家中，发展中国家有几个？

A．10个

B．9个

C．8个

D．7个

答案

答案：D

本题主要考查的是人口的相关知识。世界上人口过亿的10个国家中，发展中国家有7个，分别是中国、印度、巴基斯坦、印度尼西亚、孟加拉国、尼日利亚、墨西哥。

完形填空

完形填空。

     Traffic is very important. It means everything and everybody is using the roads.
Today more and    1 people live in the cities.  So there is    2    traffic and usually not
enough 3 , and    4   of the roads are too narrow (狭窄的).  That is  5   there are
a great many accidents.  In cities   6 over the world thousands   7    people die or
   8   hurt in accidents.  Of course, traffic accidents can't often  9  in the countries,
because there is not   10   much traffic, so there are not so many accidents.  Each of us
should care for our lives (生命).

( )1. A. most
( )2. A. a lot of
( )3. A. ways
( )4. A. some
( )5. A. because
( )6. A. of
( )7. A. from
( )8. A. receive
( )9. A. happen
( )10. A. too

B. many
B. many
B. means
B. much
B. so
B. all
B. and
B. go
B. have
B. so

C. some
C. a number of
C. roads
C. more
C. why
C. and
C. with
C. are
C. produce
C. enough

D. more
D. lots
D. cars
D. few
D. that
D. from
D. of
D. take
D. form
D. such

选择题

绿色开花植物受精后，发育成种子的是[ ]

A．受精卵

B．胚珠

C．子房

D．子房壁