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一、判断题（正确的打“√”，错误的打“×”。共10分，每小题1分）（ ）1．大气压的数值是1．01×105帕斯卡。（）2．密度的单位1千克／米3比1克／厘米3要大。（）3．质量大的实心物质其密度一定大。（）4．可以利用密度来鉴别物质。（）5．物体对桌面的压力总等于它的重力?
I. Judging questions (correctly playing “√” and wrongly playing “×”. A total of 10 points, 1 point for each small question) () 1. The atmospheric pressure is 1.01 x 105 Pascals. ()2. The unit of density is 1 kg/m3 more than 1 g/cm3. () 3. Masses of solid material must have a high density. () 4. Density can be used to identify substances. () 5. Is the pressure on the table equal to its weight?