题型:选择题 I feel sure I ________ her somewhere before. A.was to meetB.have metC.had metD.would meet 查看答案
题型:单项选择题 A1/A2型题 关于DNA碱基组成的规律哪项正确?()A.([A]+[T])/([C]+[G])=1B.[A]=[C],[T]=[G]C.[A]=[T],[C]=[G]D.[A]+[T]=[C]+[G]E.[A]=[G]=[T]=[C] 查看答案