Hydrogen is the fundamental element of the universe______it provides the building blocks from which the other elements are produced.
A. so that
B. now that
C. in that
D. but that
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They were expected to be models of virtue, honoured as______for their character as for their learning.
A. much
B. more
C. great
D. many
1980年我国国民经济生产总值超过:
A. 10000亿元
B. 15000亿元
C. 20000亿元
D. 5000亿元
下列哪个国家是人口老龄化最为严重的国家?
A. 日本
B. 德国
C. 中国
D. 俄罗斯
到2050年,经济欠发达地区的老年人大约会增加多少人?
A. 1.66亿
B. 1.76亿
C. 1.86亿
D. 1.96亿