【单选题】You'd better have the dog surveyed before you offer to buy it.
【单选题】Their class is __ a camera, a TV and a computer.
【单选题】冬期开挖路堑时,表层厚度在lm以内的冻土层宜选用( )。
【单选题】The Pacific Northwest is ______ with a mild maritime climate like that of Britain.
【简答题】我国在三相四线制(低压供电系统)的照明电路中,相电压是(________)V,线电压是(________)V。
【多选题】我国1950年《婚姻法》第5条规定:除兄弟姐妹外的其他5代内旁系血亲间禁止结婚的问题,从习惯。下列哪一或哪些选项对此的说法可以成立?( )
C.
经过国家认可的习惯已经改变了性质,成为法律了