单项选择题
被称之为”皮肤的天然水库”的是哪一层？ A.
角质层 B.
颗粒层 C.
基底层 D.
有棘层
被称之为”皮肤的天然水库”的是哪一层？ A.
角质层 B.
颗粒层 C.
基底层 D.
有棘层
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单项选择题
Paraphrase: Choose the choice that best explains the meaning of the original sentence.
When there is an absence of reliable information about drugs, the risks involved in using them are greatly increased.
Paraphrase: Choose the choice that best explains the meaning of the original sentence.
When there is an absence of reliable information about drugs, the risks involved in using them are greatly increased.
A．The risks involved in using drugs have increased.
B．There are no risks involved in using drugs if we have reliable information about them.
C． Using drugs is more dangerous when we don’t know what effects and danger are involved.
D．There is no reliable information about drugs.