In order for a chemical to be considered a drug, it must have the capacity to affect how the body works. (1)_________________________. Drugs are approved only after tests have demonstrated that they are relatively safe when used as directed and when their benefits outweigh their risks.
Thus some very dangerous drugs are approved because (2)______________________. Many people suffer ill effects from drugs called side effects, (3)________________________. The human population contains a great variety of genetic variation, but drugs are tested on just a few thousand people.
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作者: iamdengyue 时间: 2013-11-2 01:31
支持下去。。。会认真学习，有用~作者: susan.sui 时间: 2013-11-4 09:20
***has the power to do this is completely safe
they're necessary to treat serious illnesses
even though they take the drug exactly as directed.作者: lbxg 时间: 2013-11-15 10:39
nice作者: 伊梦青依 时间: 2014-4-28 09:56
stance has a power to do this it completely safe作者: a58246983 时间: 2014-4-28 11:02
