What the teachers really doubt is ______ this student will get on well with the other students after he was caught stealing. A. whether B. that C. when D. why 答案:A16.450mL的酒精用去一半后,关于剩下的酒精,下列的说法正确的是( )A.体积和密度是原来的一半,质量不变B.质量和密度是原来的一半,体积不变C.质量和体积是原来的一半,密度不变D.质量、体积和密度都变成原来的一半