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【单选题】
关系数据库中主键的作用是( )A.
标识表中唯一的行
B.
创建唯一的索引、允许空值
C.
只允许以表中第一个字段建立
D.
系统自动编号
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反馈参考答案：
举一反三
【单选题】The drugs will be eliminated almost completely by how many t1/2 when administered once.
A.
4
B.
2
C.
3
D.
5
【单选题】Prescription drugs are almost passed over a counter from the pharmacist to customer.
A.
Right
B.
Wrong
C.
Not mentioned
【判断题】Drugs are not rarely administered as pure drug substances and are almost always given as pharmaceutical preparations.
A.
正确
B.
错误
【单选题】Drugs are almost always given as
A.
pharmaceutical preparations
B.
pure drug substances
C.
powdered substances
D.
tablets or capsules
【单选题】Prescription drugs are almost passed over a counter from the pharmacist to customer.
A.
Right
B.
Wrong
C.
Not mentioned
D.
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