题目: |a|=1,b=-2,则a-b的值是( )A.3B.-1C.3或-1D.3或1 答案: ∵|a|=1,∴a=±1,∴a-b=1-(-2)=1+2=3,或a-b=-1-(-2)=-1+2=1,即a-b的值是3或1.故选D.
题型:默写题 名篇名句默写(1 )三岁为妇,靡室劳矣;____________,靡有朝矣。(《氓》)(2 )蟹六跪而二螯,____________,____________。(《劝学》) (3 )____________,金块珠砾, 弃掷逦迤,秦人视之,亦不甚惜。(《阿房宫赋》)(4 )登斯楼也,则有心旷神怡,____________,____________,其喜洋洋者矣。(《岳阳楼记》) (5 )孟子曰:民为贵,____________,____________。(《孟子》) 查看答案