如何装拆个人保安线？
参考答案：装设时，应先接接地端，后接导线端，且接触良好，连接可靠。拆除个人保安线的顺序与此相反。个人保安线由作业人员负责自行装、拆。
I prefer ______ there doing nothing.
A. working than sittingB. to work than to sitC. working to sitD. to work rather than sit
直肠指诊时，直肠壁触及坚硬凹凸不平的包块考虑为
A．肛裂B．痔C．肛门周围脓肿D．直肠癌E．直肠息肉
