题目

— I _ it as a must of a student that he should say hello to his teachers first whenever they meet.    — I can’t agree more.    A. take                B. look        C. think             D. make 答案：A在《探究小车速度随时间变化的规律》实验中，将下列步骤的代号按合理顺序填写在横线上：    A．将小车移至靠近打点计时器处，先接通电源，后放开纸带B．将打点计时器固定在平板上，并接好电路C．把一条细绳拴在小车上，细绳跨过定滑轮，下面吊着重量适当的钩码D．断开电源，取下纸带E．将纸带固定在小车尾部，并穿过打点计时器的限位孔F．换上新的纸带，再重复做三次．