题目

 看图短文填空 May 29, 2014   Thursday Today I read a piece of shocking news in the newspaper. It really makes me feel _1_____. It was a story that happenedin Shanghai. ___2___ 80-year-old man fell downat the backdoorway of a bus, but he couldn't __3____ up by himself. Other passengers near the man looked at him. 4      , no one dared to lend a helping hand. So the old man shouted, Help me, please! I fell down all by ___5_, I promise! The case reminded many people of a similar incident in Nanjing in 2007. A young man ____6___ Peng Yu helped a fallen old woman stand up.PM2.5是指大气中直径≤2.5微米的颗粒物，也称为可入肺颗粒物。它含大量的有毒、有害物质因而对人体健康和大气环境质量的影响很大，那么2.5微米＝       米。北方常见的沙尘暴天气对环境影响也很大，此现象        （填“属于”或“不属于”）扩散现象。