题型:选择题 Our enemy bills have been increasing steadily. these costs,our telephone costs have doubled over the past six months.A.MoreoverB.In addition toC.As a result of D.Contributing to 查看答案
题型:选择题 对于3.4克氨气的有关说法,正确的是( )A.常温常压下体积为4.48LB.含有0.1molN和0.3molHC.常温下,所含原子有0.8molD.溶解到1L水中,所得溶液物质的量浓度为0.2mol/L 查看答案