若a<b<0,则下列结论中,正确的是(    )A.>和均不能成立B.>和均不

若a<b<0,则下列结论中,正确的是(    )

A.均不能成立

B.均不能成立

C.和(a+)2>(b+)2均不能成立

D.和(a+)2>(b+)2均不能成立

答案

解析

:用排除法.∵a<b<0,

<0.

,a+<b+<0.

∴(a+)2>(b+)2.

又∵a<b<0,

∴a<a-b<0.

.

故排除A,C,D,选B.

答案

:B

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