单项选择题
A.2B.1C.0D.3E.出现错误提示
A.a +b =cB.36=sin(a)C.c =a /bD.sin(a)=b *c
A.Int(Rnd()*30+20)B.Int(Rnd()*31+20)C.Int(Rnd()*50+20)D.Int(Rnd()*20+50)
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