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【多选题】
煤粉仓粉位检测必须考虑下列因素 【 】A.
用接触式探测时可用截面积小的重锤
B.
检测探头最好具有防尘性
C.
电阻式检测
D.
应考虑温度对声速的影响
E.
采用非接触式超声探头时，不会造成粘附作用
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【多选题】According to the text, which of the following are caused by the drug abuse?
A.
There is a strong association between drug use and crime.
B.
Drug dependence takes a significant toll in terms of personal health and safety
C.
Drug abuse is a major cause of unemployment
D.
There are great economic losses because of drug abuse
【简答题】Our research has focused on a drug which is so _____ as to be able to change brain chemistry. A. powerful B. influential C. monstrous D. vigorous
【单选题】Which of the following is NOT correct about drug
A.
drugs can obtain from plants, animals, or minerals
B.
each drug has only one generic name
C.
drug only induce beneficial effects
D.
may change to poison
【多选题】Which of the following are probably caused by the drug abuse?____
A.
There is a strong association between drug use and crime.
B.
Drug dependence takes a significant toll in terms of personal health and safety.
C.
Drug abuse is a major cause of unemployment.
D.
There are great economic losses because of drug abuse.
【单选题】( )第一次将旅游产业提升到生活服务业的层面,意味着旅游服务将成为现代生活方式的重要层面。
A.
《国务院关于加快发展旅游业的意见》
B.
《关于加快发展生活性服务业促进消费结构升级的指导意见》
C.
《国务院关于促进旅游业改革发展的若干意见》
D.
《关于进一步促进旅游投资和消费的若干意见》
【单选题】According to the author, which of the following is the main objective of a drug addict？
A.
Quitting drugs．
B.
Getting financial help
C.
Having drug all the time．
D.
Spiritual comfort．
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