生品有强烈致吐作用，酒炙后减少呕吐的副作用的是( )
A. 大黄
B. 白芍
C. 常山
D. 威灵仙
E. 续断
During Prohibition, people ______.
A. lived in fear of the law
B. were willing to risk arrest for the pleasure of liquor
C. recklessly endangered their communities
D. were respectful of the legal sanctions placed on them
由白矾制成枯矾，传统方法约失重( )
A. 20%
B. 45%
C. 60%
D. 75%
E. 90%
The author states all the following EXCEPT that ______.
A. the development of present technologies can not provide any answers to today's problems
B. an increasing number of young scientists are taking a great interest in biological and social sciences
C. many people as well as scientists have come to understand the limits of natural resources
D. many scientists argue that high technology is something but not everything
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