题目

Events Long March exhibit The Shanghai History Museum is putting on an exhibition to mark the 60th anniversary of the Long March. On show are more than 220 photos and 40 items that explain with pictures how the communist Red Army drew back from its besieged ( 被围困的) bases in Jiangxi Province and fought its way to northern Shanxi province in the mid-1930s. Explanations are all in Chinese. The show will end on November 20. Time: 10:00 am—4:00 pm. Address: 1286 Hongqiao Road Admission: 8 yuan for Chinese/ 15 yuan for foreigners Thai elephants Eight elephants from Thailand are7．9×103kg/m3的物理意义是_____________________。冰的密度是0．9×103kg/m3；一块体积为100 cm3的冰熔化成水后，质量是______g，体积是______ cm3。