“银行汇票重打”交易是（）
A、4110
B、4111
C、4112
D、4113
参考答案：C
简述公务员保险的作用。
I took part in the ____ in the sports meeting last week.
A．800-meter-long
B．800-meters-long
C．800 meter long
D．800 meters long
