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【单选题】
胚泡的组成不包括A.
胚盘
B.
内细胞群
C.
滋养层
D.
胚泡腔
E.
极端滋养层
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皮皮学刷刷变学霸
举一反三
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A.
special
B.
peculiar
C.
notable
D.
exceptional
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A.
There is no such thing as green shopping.
B.
Consumers have the right to know the truth.
C.
The green labels on products are mostly misleading.
D.
Producers should feel guilty for deceiving consumers.
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A.
正确
B.
错误
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【简答题】湿式系统主要有__________、___________、__________、__________及供水管网组成。
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