单项选择题

Why does the law require that some drugs be used under a doctor's prescription

A．Because they are not safe.
B．Because they need further special tests.
C．Because they are meant to cure serious diseases.
D．Because the prescription can ensure the safe use of the drugs.
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单项选择题
Why shouldn't you continue to take the same medicine for the same illness without your doctor's permission
A．Because some medicines may have side effects.
B．Because there will be better medicines for your illness.
C．Because your illness may become more serious.
D．Because the effect of some medicines may be lost.
单项选择题
What is the author's attitude towards the flat organization without a hierarchical system
A．Indifferent.
B．Negative.
C．Neutral.
D．Positive.
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