(1)48×512=20;
(2)27÷35=45;
故答案为:20,45.
Many people like Xiao Shenyang because he often makes people _______ happily..
A.laughing
B.to laugh
C.laugh
D.laughs
(三) 问题:
尺寸精度、形状精度、位置精度的定义各是什么