“这个伟大的事件，以打响武装反抗国民党反动派第一枪的英雄壮举，以党独立领导的新型人民军队诞生的重要标志，载入了中国革命史册。”这里的“这个伟大的事件”距2017年多少周年？（    ）

   I am an English girl. My name is Mary. I’m twelve. My dad and mom are English teachers. I have a brother（哥哥）. His name is Tom and he is thirteen years old. We are in China now. We are in Beijing No. 4 Junior High School. Tom is in Class 4, Grade 7 and I am in Class 9, Grade 7. I have a dog. My dog looks strong. It has a big mouth and two big black ears. We have many(许多) Chinese friends here. They are good.

（2015•宿迁）读某城市“热岛效应”示意图．判断．

“热岛效应”导致市区温度升高，改善了郊区空气质量。