一、以物理小仪器制作应用实践活动为背景的命题。例1(2014·泰州)小明按照教材中“综合实践活动”的要求制作简易密度计。(1)取一根粗细均匀的饮料吸管,在其下端塞入适量的金属丝并用石蜡封口。塞入金属丝的目的是使吸管能%%%在液体中。(2)将吸管放到水中的情景如图(a)所示,测得 First, the physical small instrument production application practice as the background proposition. Example 1 (2014 · Taizhou) Xiao-Ming in accordance with the textbook “integrated practice activities ” requirements to produce simple density meter. (1) Take a drink straws with a uniform thickness, stuff a proper amount of wire at the lower end and seal with paraffin. The purpose of the wire insertion is to make the pipette %%% in liquid. (2) the straw into the water scene shown in Figure (a), measured