下面为CO₂加氢制取乙醇的反应：

2CO₂（g）+6H₂（g）⇌CH₃CH₂OH（g）+3H₂O（g）

△H=QkJ/mol （Q＞0）

在密闭容器中，按CO₂与H₂的物质的量之比为1：3进行投料，在5MPa下测得不同温度下平衡体系中各种物质的体积分数（y%）如图1所示．完成下列填空：

（1）表示CH₃CH₂OH体积分数曲线的是____ （选填序号）．

（2）图1中曲线a和c的交点R对应物质的体积分数 y_R=____ %．

（3）在强酸性的电解质水溶液中，惰性材料做电极，电解CO₂可得到多种燃料，其原理如图2所示．

①该工艺中能量转化方式主要有____ 

②电解时，生成乙烯的电极反应式____ 

（4）在3L容积可变的密闭容器中发生反应，H₂（g）+CO₂（g）⇌H₂O （g）+CO（g）已知c（CO）﹣反应时间t变化曲线Ⅰ如图3所示，若在t₀时刻分别改变一个条件，曲线Ⅰ变为曲线Ⅱ和曲线Ⅲ．当曲线Ⅰ变为曲线Ⅱ时，改变的条件是____ 

当曲线Ⅰ变为曲线Ⅲ时，改变的条件是____ 

生态农业是指运用____原理，在环境与经济协调发展的思想指导下，应用现代科学技术建立起来的多____ 、多____的综合农业体系。

分布在亚洲东部的主要气候类型有（    ）

    Joe Read studied in this school for four years. When he finished school, he was already eighteen years old. And then his father said to him, “You finished school, and you are a good student. Now you may go to town and get a good job. They need some clever people to work in the office. The people there can get a lot of money now. If you stay at home, you can't get money from our family.” A few weeks later, Joe went to the office and asked for a job there. A man took him into a small room and gave him some questions on a piece of paper. Joe answered the questions quickly, and he gave the paper to the man. The man looked at the paper for a few minutes and then asked, “You were born on Sep. 23. But which year were you born in?” Joe answered, “Oh, every year.”