发送()至10010可自助查询剩余话费
A、CXHF
B、HF
C、CXYE
D、CXLL
参考答案:C
_________ to sunlight for too much time will do harm to one's skin.
A.Exposed
B.Having exposed
C.Being exposed
D.After being exposed
汽水系统密闭何意?