E-mail, as well as telephone, ______ an important part in daily communication.

A．is playing

B．have played

C．are playing

D．played

监狱应设立专门、独立的危险品仓库存放易燃易爆等危险品，由（）管理，并建立《危险品出入库登记台账》，严格履行出入库登记手续。危险品仓库储存的危险品数量不得超过1周用量，监区按生产需要量（）领用。

A.职工专门；每周

B.警察直接；每天

C.专项工种罪犯；每天

D.警察直接；每周