防雷保护装置安装要求每栋建筑物地面以上至少留有（）个接地电阻测定用的测点，并标识明显清晰。
A．1
B．2
C．3
D．4
参考答案：B
粘膜及皮肤皱褶部位水疱、糜烂、疣状增生、脓痂。属于天疱疮哪一类型：
A．外感风热之毒，阻于肺胃二经，蕴蒸皮肤而发B．情志内伤，肝气郁结，久而化火，肝经火毒，外溢皮肤而发C．寒湿困脾，脾失健运，肌肤失养而发D．肝胆湿热，蕴结肌肤而发E．禀赋不耐，风、湿、热毒郁于肌肤而发
Her uncle _____ to the factory. He'll be back _____ an hour. [ ]
A. has gone, after
B. has been, in
C. has gone, in
D. has been, after
