了解三氯 乙醛 的毒性和致突变作用.Acute toxicity test , mutation test and single - cell gel electrophoresis ( SCGE ) were used.三氯乙醛是无色挥发性的液体,带有刺激性很强的气味,在97.7℃沸腾.Chloral is a colorless, volatile liquid with a very penetrating odor and bo...
Meggie followed the dwindling forms of her brothers at a run.麦琪奔跑着追赶哥哥们逐渐缩小的背影.He covered the distance to his house on Downing street at a run.他一口气跑到唐宁街他的家里.He at a run but soon tired and slowed to a walk.他跑步开赴,但很快就累得慢下来...
Come on with your good fiend, and participate in forestry centre driftage.来吧,带上您的亲朋好友, 参加林区漂流.You are going to continue your driftage after the entertainment by our protectors.游乐逗留结束,可在护漂员护理下继续漂流....