DJ6经纬仪采用测回法观测水平角，当两个“半测回”的角值之差不超过( )时，取其平均值作为一测回的角值。
A. 60"
B. 40"
C. 30"
D. 20"
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根据金融市场上交易工具的期限，可把金融市场分为( )两大类。
A. 现货市场和期货市场
B. 股票市场和债券市场
C. 发行市场和交易市场
D. 货币市场和资本市场
According to the passage, which one is NOT TRUE
A. In the UK, 29 percent of the boys surveyed in the UK tried binge drink at least 3 times in the previous month.
B. 42 percent of boys surveyed had attempted illegal drugs.
C. There are more girls indulging in binge drinking according to the survey.
D. Binge drinking is defined as drinking more than 5 alcohol one after another.
“神经激素”就是
A. 作用方式类似神经递质的激素
B. 神经细胞分泌的激素
C. 神经系统内存在的激素
D. 作用于神经细胞的激素
E. 具有酶功能的神经递质
According to the passage, the number of young cocaine takers in Spain is ______.
A. smaller than that in the UK
B. bigger than that in the UK
C. the same as that in the UK
D. vet to be investigated
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