1.用公式例1给你天平、量筒、小铁块和水,怎样测出一只小木块的密度?方法(1)用天平称出小木块的质m.(2)往量筒中注入适量的水,用细线将铁块拴住缓慢投入量筒中,测出铁块的体积V1.(3)取出铁块,用细线和木块拴在一起投入量筒,测出木块和铁块的总体积V2.则(?) 1. How to measure the density of a small block using formula example 1 for your balance, measuring cylinder, small iron and water? Method (1) Weigh the mass of the small block with a balance m. (2) Inject proper amount into the graduated cylinder In the water, slowly put the iron into the measuring cylinder with a thin wire, and measure the volume of the iron. V1. (3) Take out the iron and put it in the measuring cylinder with the thin wire and the wooden block to measure the wood and iron. The total volume of V2. (?)