一、填空题１．水的密度是千克／米３，其物理意义是。２．被测物体的质量是０．０３７千克，在用天平测量物体质量时。应该在天平的。盘中放进的砝码，依次是克、克、５克的各一个，并在图１中的标尺上画出游码的位置．３．人们平时说的铁比木头重，实际上应是指相同的铁块和? First, fill in the blank 1. The density of water is kilograms per cubic meter and its physical significance is. 2. The mass of the measured object is 0.037 kg. When measuring the mass of the object with the balance. It should be on the balance. The weights placed on the discs were one each of grams, grams and 5 grams, and the position of the code was drawn on the scale in Figure 1. 3. People usually say that iron is heavier than wood. In fact, it should mean the same iron and?