题目

根据杠杆平衡条件可知，在阻力和阻力臂保持不变时，_______动力臂，可以_______动力，从而实现更省力(填“增大”或“减小”)。在图中，_________图的握法更有利于拧紧或松开螺帽。 答案： 增大，减小，b连词成句，标点已给出。1.going Shanghai to I’m move to .2.like good sounds a plan that .3.want be doctor I to a when up grow I ?4.think what you shows talk of do .5.common shows these have thing one all in .