题目

My city Suining is a great place to live in. It’s the best place to enjoy your free time. There are some movie theaters in the city, such as Baoli Cinema、Wanda Cinema、Yongyi Cinema、Zhonghuan Cinema……They are all good, but the nearest one to my house is Wanda Cinema. It is the best. It has the best sound and the most comfortable seats. Shopping is also easy. There are many shops and most of them are popular. They sell very fashionable clothes. The prices are also cheaper than ones in other cities, so students love to shop here . There are also a lot of video and music stores. These 按我国现有13亿人口计算，如果每人每年浪费0.5千克粮食，那么每年浪费总计就是6.5亿千克粮食，6.5亿用科学记数法表示为 ．