主变压器重瓦斯保护和轻瓦斯保护的正电源,正确接法是( )
B
暂无解析
Mr.Greenisusedto_________twoapplesafterluncheveryday.
Hesetupinbusiness()hisownandwasverysuccessful.
Ibelievethatremark____fromwhatyousaidyesterday.
_____,hecannowonlywatchitonTVathome.
Duetothebadweathertheplanewas____fortwohours.