关于握拳试验的叙述错误的是:().
A.前臂中立位握拳
B.拇指位于掌心
C.使腕关节桡偏
D.桡骨茎突部位疼痛
E.诊断为桡骨茎突腱鞘炎
参考答案:C
Joseph _____ to evening classes since last month, but he still can't say "What's your name?" in Russian. [ ]
A. has been going
B. went
C. goes
D. has gone
( )是防止发生直接触电和电气短路的基本措施。
A.接地
B.接零
C.绝缘
D.中性点直接接地