第29题: [单项选择]甲状腺功能亢进的临床表现,不正确的是() A. 高代谢综合征 B. 紧张焦虑,手和眼睑震颤 C. 心动过速,心律失常 D. 便秘,排便次数减少 E. 可出现周期性瘫痪和肌无力 参考答案:D
第30题: [单项选择]The mechanical efficiency of an engine () because losses occur in the form of friction. A. is always less than 100% B. is always more than 100% C. is always equal to 90% D. is always less than 90% 参考答案:A