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)
A.对x进行四舍五入B.对x进行取整C.取x的平方根D.计算x的绝对值