广东金融结算服务系统补打只能是（）进行操作。
A.运营经理
B.后台授权柜员
C.原打印柜员
D.临柜员工
参考答案：C
已梳的聚丙烯腈及其变性短纤
—Henry, ________ the light is ________ when you leave the lab.
—All right.[ ]
A. be sure; turned on
B. make sure; turned off
C. sure; turning off
D. make sure; turning off
