甲状腺功能亢进施行甲状腺大部切除术后第一天出现声音变弱，比较单调，且不能发高音，发音易疲劳，但不是声音嘶哑。喉镜检查声带活动可有（）

A.喉返神经损伤

B.喉上神经内、外支损伤

C.一侧喉上神经内侧支损伤

D.一侧喉上神经外侧支损伤

E.喉头水肿

According to the writer of this article, how many people sign up as new mobile phone subscribers in China every month a. 10 million. b. 7 million. c. 5 million. d. 22 million.