一般情况下,金属的晶粒越细,力学性能越好。
参考答案:对
单项选择。
Would you like some milk, Andy? [ ]
A.No, I would not.
B.Yes, I would like.
C.No, thanks.
D.Yes, I would.
我国《行政处罚法》自2004年7月1日起施行。