发电厂、变电所及爆炸危险场所必须装设人工接地体。第五章
参考答案：对
食管、胃底静脉破裂出血
A．腹痛、发热、黄疸B．水量便鲜血C．出血伴腹痛高热D．出血速度慢、便血为主E．出血速度快、呕血或便血
— Kathy and her sister are so alike.
— Yeah, I can't tell one from _____. [ ]
A. another
B. other
C. the other
D. others
