Blog, a shared on line journal where people can post diary entries about their personal experience and

hobbies, ___ more and more popular with people of all ages．

A．becomes

B．become

C．becoming

D．is becoming

引进浅冷装置工艺操作中，螺杆制冷机组滑阀关闭时，负荷为（）%。

A.0

B.10

C.90

D.100