接地线一经拆除，不带电设备仍进行作业。
参考答案：错
you don't like him is none of my business.
A．What
B．That
C．Whoever
D．Whether
无淋巴结转移的癌是
A．早期大肠癌
B．早期胃癌
C．早期食管癌
D．肺鳞癌
E．胰腺癌
