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【单选题】
抗胆碱药物解除支气管痉挛的机理是( )A.
增加cAMP的含量
B.
抑制免疫反应
C.
抑制α受体功能
D.
使β3受体兴奋
E.
抑制M，型受体
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【简答题】Human activity could bring about melting of the ______ in this century.
【单选题】企业在产品目标市场选择时,一般有五种市场覆盖模式,某企业专注生产婴幼儿各类产品,该企业采取的是( )。
A.
市场集中化
B.
产品专门化
C.
市场专门化
D.
有选择的专门化
E.
市场全面化
【单选题】企业在产品目标市场选择时,一般有五种市场覆盖模式,燕京啤酒主要生产啤酒系列,该公司采取的是( )。
A.
市场集中化
B.
产品专门化
C.
市场专门化
D.
有选择的专门化
E.
市场全面化
【简答题】Don't pretend to know. You don't know it. Don't pretend not to know. You really know it.
【单选题】All the human beings speak a certain kind of language and more. But have you ever ob serve the process of an infant's beginning of learning a language from its parents? What is the importance of a lan...
A.
he wanted to prove that children are born with the ability to speak.
B.
he ignored the importance of mothering to the infant.
C.
he was unkind to the nurses.
D.
he wanted to see if the children could die before they reached the age of one.
【单选题】The best statements about human error is( )
A.
Error is an inevitable part of human behavior
B.
As long as we pay more attention, and operate accurately, we can avoid the error
C.
Only a small part of accidents were caused by human error
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