I'd like a pet,but I am busy all day.
Goldfish are a good choice.You____feed them every day.( )
must
can't
need n't
计算乘法时,302和3相乘得( )。A.906B.960C.0
2×208=( )A.416B.461
2乘205( ),括号中应填的数是( )A.410B.401
如果204×b=0,那么( )A.b一定等于0B.b一定不等于0C.b为任意数
550×3得( )