It's very bad for your ______ to read in the sun. [ ]
A. eyes
B. hands
C. arms
D. ears
答案:A
应用扇形软卡爪装夹薄壁工件时,软卡爪圆弧的直径应比夹紧处外圆直径小些。( )
神经衰弱辅助检查有哪些有什么临床意义?