一根绳,用去后还剩米,用去的和剩下的相比( )
1.02化成百分数是( )A.102% B.1.02% C.10.2%
1.225化成百分数是 ( )
2.8里面有几个1%?( )A.2.8 B.28 C.280
1.9%化成小数是( )A.0.019 B.0.19 C.1.9
8.121212121212是( )小数.A.循环 B.无限 C.有限