题型:名词解释 All the candidates present at the conference have contributed to the development of our country, so they are each recognized specialists in their _________fields.A.respectiveB.respectedC.respectingD.respectful 查看答案
题型:名词解释 某同学探究物体的加速度a与力F的关系时,他把砝码和砝码盘的总重力作为对小车的拉力,在不改变小车质量的前提下,依次改变砝码的数量,从而改变对小车的拉力,并依次测出了小车的加速度a,然后画出了如图所示的a-F 图象.该图象虽然是一条直线,但不通过坐标原点.请你分析一下原因,应如何改进实验才能使得出的图象通过坐标原点? 查看答案