新视通业务的入网和业务变更（升速/降速）在不需要做本地电路接入，只做平台数据，时限要求为（）个工作日
A.3
B.5
C.10
D.20
参考答案：B
More TV programs,according to government officials, will be produced ________ people's concern
over food safety. [ ]
A. to raise
B. raising
C. to have raised
D. having raised
纯比例调节用于工艺系统（）调节。
A、液位
B、压力
C、流量
