在流程银行系统办理单位活期账户开户时，打印的受理凭证上加盖（）
A.受理凭证专用章
B.业务清讫
C.业务公章
D.结算专用
参考答案：A
—Susan stays alone in the classroom and looks sad.
—_____________to her?
A What happens B What has happened
C What is happening D What was happening
（）协议可以根据已知的IP地址确定的MAC地址
