题目

阅读下面短文，从短文后各题所给的四个选项中，选出可以填入空白处的最佳选项。   During my second year of college I had to look for another place to live in. One Sunday after church the pastor(牧师)   36   me to stay in his daughter’s room because she was studying abroad for one year.   To be honest, I really didn’t want to stay with the pastor’s family.   37   then he old me how much rent would be—a very   38__ figure that included one home-cooked meal a day. I thought about it and    39   to move in.    At the end of the term I ha关于合力对物体速度的影响，下列说法不正确的是（　　）A．如果合力总跟速度方向垂直，则物体的速度大小不会改变，而物体的速度方向改变B．如果合力方向跟速度方向之间的夹角为锐角，则物体的速率将增大，方向也会发生变化C．如果合力方向跟速度方向之间的夹角为钝角，则物体的速率将减小，方向也会发生变化D．如果合力方向跟速度方向在同一条直线上，则物体的速度方向不改变，只是速度大小发生变化