A.1.20%.~2.20%. B.0.78%.~0.82%. C.18%.~20%. D.0.20%. E.0.15%.

admin2009-05-16  1

问题 A.1.20%.~2.20%.
B.0.78%.~0.82%.
C.18%.~20%.
D.0.20%.
E.0.15%.

选项 A、 
B、 
C、 
D、 
E、 

答案C

解析
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