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2015걨ԱˮƽԿÿһ12.2
Ա 2014/12/2 ղرҳ 縨γ

49.Ľ˾ʱ˰ͽڻ˰Ļ( )

A:ڱάйƷ޴۵ֳйع涨㲿

B:ڹʺдͺ

C:ͶҵڹӹƷϼ

D:ͶҵùԭϼӹƷڻ׼չڲƷڵĻ

ȷ𰸣A, B

𰸽ݺع涨лĽ뾳ʱ˰ͽڻںش˰

(1)ڱάйƷ޴۵ֳйع涨㲿;

(2)ڹʺдͺ;

(3)ҹ涨˰

ˣȷΪAB

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