My brother buys a doll __________ me.[ ]
A. in
B. on
C. for
答案：C
No sooner had he got home than he ____his coat and sat down at the table.
A．threw off
B．threw out
C．threw about
D．threw sway
计量检定是指为了确定计量器具的（）性能是否符合要求所进行的工作。
A.使用
B.计量
C.结构
D.检验
