单项选择题

青少年为避免染毒悲剧的发生，要构筑起良好的心理防线。下列选项中关于构筑心理防线的认识正确的是？（）

A、面对毒品，可以因为好奇而尝试一次

B、可以跟染上毒瘾的人密切往来

C、树立正确的群体意识，不盲目的赶时髦

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A、正确
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单项选择题

Read the following sentence and identify the best paraphrase.
The amphibia, which is the animal class to which our frogs and toads belong, were the first animals to crawl from the sea and inhabit the earth.

A．The first animals to leave the sea and live on dry land were the amphibia, such as frogs and toads.
B．Frogs and toads belong to the animal class amphibia.
C．The amphibia, the animal class to which frogs and toads belong, were the first animals that move from the sea to the earth.
D．Frogs and toads are the amphibia that comes from sea to earth.