题目

Due to the lack of money, Irecommended that he (avoid) using this expensive piece of equipment. 答案：【1】(should) avoid弹簧秤下端挂一个物体，将其全部浸入水中，受到有浮力是0.49N，弹簧秤的示数是0.83N，该物体的物重是______N，物体的体积是______m3，若把此物体放在水银中受到的浮力是______N，排开水银重为______N．