I think________of the materials I listened to at the beginning of the_____easy. A.two thirds;is B.second three;are B.two thirds;are D.two third;are 答案:A19.对于反应A(g)+3B(g)??2C(g),下列各数据表示不同条件下的反应速率,其中反应进行得最快的是( )A.v(A)=0.5mol•(L•min)-1B.v(B)=0.4mol•(L•s)-1C.v(B)=0.3mol•(L•s)-1D.v(C)=0.2mol•(L•s)-1