负拉力下降时，负拉力越大则下降距离(    )。 A.
越大 B.
不变 C.
越小

单项选择题管仲建议齐桓公称霸并最后被采纳，这一举动相当于在企业管理或个人生活

单项选择题An experiment consists of three stages. There are two possible outcomes in the first stage, three possible outcomes in the second stage, and four possible outcomes in the third stage. Drawing a tree diagram for this experiment will show that the total number of outcomes is:A.9.B.24.C.26.D.18.