阅读下列短文，回答问题：

汽车作为曾经推动人类文明向前跃进的现代社会的产物，在给人类的生活带来便捷舒适的同时，对自然生态环境的恶化也有难以推卸的责任．大气污染主要来源于工业污染和汽车尾气，99%的一氧化碳和一氧化氮的排放来源于汽车尾气．我市近几年来汽车保有量的增长很快，环保面临如汽车污染等问题的考验．

另据报道：将氢气应用于汽车发动机的技术已在我国研制成功；酒精为燃料的汽车已在北京市、河南省使用；很多地方已将一部分汽车改用液化气作燃料．

（1）请提出我市治理汽车污染的一条合理化建议：____ 

（2）就目前情况看，氢气作燃料的汽车要投入使用前，你认为还要研究解决的问题有：____ ．

（3）若实验用氢气汽车运行1km，需要2.858×10⁶J能量．现这辆车在我市沿江路上走一圈（约30km），需____ g氢气．（已知每克氢气燃烧放出1.429×10⁵J能量）．

中国东部主要的气候类型是（    ）

假设其他条件不变，下列与图所反映的信息相符合的是（  ）

B

    I'm Tom and I like sports. Basketball is my favourite. I play it in. my school in the morning. My school is big and there is a playground and a sports hall in it. Every morning, many teachers and students play sports in the playground. I play there with my friends too. When the weather is bad we play in the sports hall. It's on the left of the playground. Now I'm in the sports hall but I don't play basketball. Some students from London are in our school and I'm their guide (导游).

    My family also like sports too. My parents kick(踢)jianzi near our home every morning. My sister Mary plays table tennis with her classmates in their school. It is small but beautiful.

____ 的相反数是它本身．