Warm­blooded animals live an active life even in freezing winter，which helps them to ________ their normal body temperature.

A．keep up

B．build up

C．bring up

D．pick up

甲亢的临床表现下述哪项错误

A．甲状腺对称性、弥漫性肿大
B．心动过速
C．性情急躁、易激动
D．甲状腺触诊有震颤
E．基础代谢率增高