图1-24表示某年赞比亚人口金字塔,从图中得出的正确推论是 ( ) 图1-24 A.农村0-14岁占农村人口的比例高于城市 B.城市青年人比例高,说明现在的人口自然增长率高 C.农村生活条件比城市低,因此老龄人口农村比城市低 D.城市人口性别比例失调,会产生某些社会问题 答案:AD根据图型可以判断。 I try to understand
__________ that prevents so many Chinese from being as happy as one might
expect.
A.why is it
B.what is it
C.why it is
D.what it is