单项选择题

制冷剂选择不符合环境亲和度要求的是()。
A、臭氧衰减指数
B、温室效应指数
C、大气寿命
D、制冷量的大小

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单项选择题
What is Nick's opinions about teaching?A.He thinks that teaching doesn't help the artistic sidE.B.He believes that teaching keeps him energetiC.C.Teaching shouldn't be totally isolated from politics.D.Teaching frustrates him so many times.
A.He
B.
B.He
C.
C.Teaching
D.
D.Teaching
E.
单项选择题
循环农业的技术目标是指( )
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