【简答题】某质点做匀变速直线运动,位移方程为 s=10t-2 t 2 ( m ),则该物体运动的初速度为 ______ ,加速度为 ______ , 4s 内位移为 ______
【单选题】_____ has questions is welcome to ask. [ ]
【单选题】It has been made __________ public that anyone who does harm to the environment in __________ public places will be blamed by __________ public.
【单选题】In this country it is required that anyone who has recently come here ______ taxes.
【单选题】MS进行小区选择时主要参考C1准则,其算式中Rxlev_Access_Min的含义是该小区的()。
【单选题】单选) 采用延时曝气法处理废水利用的是处于( )的细菌。
【单选题】砂轮上有 2500 r/min的标记,含义是
【简答题】某物体做变速直线运动的运动方程为 ,则该物体在 时的速度 ,加速度