B类电气装置进行接地保护时,可燃液体或气体、供暖系统的金属管道( )用作保护接地极。
A.可以; B.有条件; C.不可; D.严禁。
参考答案:D
This is a very interesting book. I will buy it, _____. [ ]
A. how much may it cost
B. no matter how it may cost
C. however much it may cost
D. how may it cost
周杰伦的歌曲《爱在西元前》的歌词写到:古巴比伦王颁布了,刻在黑色的玄武岩,距今已经三千七百多年……[ ]
A.《汉谟拉比法典》
B.《民法典》
C.《刑法典》
D.《商法典》