How many types of families are mentioned by the writer？
A. Six.
B. Two.
C. Five.
D. Four.
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What percent did the families headed by one parent account for？
A. 50 percent.
B. 40 percent.
C. 35 percent.
D. 22.5 percent.
如果农村劳动力城市就业每年以100万人口递增，就业领域的比例不变，那么到2008年初商业饮食业的农村劳动力达到()。
A. 440万人
B. 450万人
C. 430万人
D. 460万人
Darwin considered ______.
A. all living things had gradually developed
B. men developed slowly
C. Mongols were fatter than the people in other places
D. people didn't protect them from the cold except Eskimos
2001年浙江省的国内生产总值比上海市多多少亿元？()
A. 1797.35
B. 1897.35
C. 1798.35
D. 1898.35
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