孟子在《告子下》中说：“天将降大任于斯人也，必先苦其心志，劳其筋骨，饿其体肤，空乏其身，行拂乱其所为，所以动心忍性，曾益其所不能……然后知生于忧患而死于安乐也。”这主要说明，在实践中自我修养应该()。
A. 不畏困难，磨练意志
B. 坐而论道，闭门造车
C. 自我欣赏，自我陶醉
D. 虚心学习，择善而从
查看答案
发现行星运动之定律的天文学家是()。
A. 伽利略
B. 开普勒
C. 哥白尼
D. 托勒密
The characteristics of information are ______ those of other economic resources.
A. same with
B. different from
C. contrary to
D. opposite to
The proper title for this passage should be ______.
A. information society
B. characteristics of information
C. two major utilitarian connotations
D. information as a resource and commodity
According to this passage, the market share of ______.
A. the U. S. information service sector was equivalent to 40 percent of the global market share
B. the U. S. information service sector was about one-seventh of the global market share
C. computers in the United States had reached about $ 3. 5 billion by 1992
D. computers in the United States is much smaller than that of television
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