____ ____sad.

能源、环境与人类生活和社会发展密切相关．

（1）目前，人类以化石燃料为主要能源，常见的化石燃料包括煤、石油和____ ．

（2）为减少污染、提高煤的利用率，可将其转化为两种可燃性气体，此过程可认为是碳与水的反应，其微观示意图如下所示：

①写出该反应的化学方程式____ ．

②该反应生成物的分子个数比为　____ ．

（3）为减少温室气体排放，人们积极寻找不含碳元素的燃料．经研究发现NH₃燃烧的产物没有污染，且释放大量能量，有一定的应用前景．

①NH₃中氮元素和氢元素的质量比为____ ．

②将NH₃燃烧反应的化学方程式补充完整4NH₃+3Ｏ₂6H₂O+____ ．

为探究原电池的形成条件和反应原理，某同学设计了如下实验并记录了现象：①向一定浓度的稀硫酸中插入锌片，看到有气泡生成；②向上述稀硫酸中插入铜片，没有看到有气泡生成；③将锌片与铜片上端接触并捏住，一起插入稀硫酸中，看到铜片上有气泡生成，且生成气泡的速率比实验①中快；④在锌片和铜片中间接上电流计，再将锌片和铜片插入稀硫酸中，发现电流计指针偏转．下列关于以上实验设计及现象的分析，不正确的是（　　）

用方框中所给单词的适当形式填空, 使短文意思完整、通顺。

    Before graduation, many classmates were busy ____ for jobs. So was I. It was very difficult to find a job in the big city. I had been ____ for many times until I found a want ad for an editor. “If you could find ____ than 10 wrong words in the newspaper, you can work ____ an editor,” the ad said. I loved literature(文学) and had written several little ____ for the newspaper. So I decided to have a try. It was the final date when I saw the newspaper. I told one of my roommates the news happily. After he ____ the news, he smiled and said “Today is April Fool's Day. It may just be an April Fool's ____. A fool may take it ____.” I was very disappointed after hearing that, but I still wanted to have a try. It took me the whole morning to find 12 wrong words in the newspaper. I ____ at the editorial department in the afternoon and got the job immediately.

    Later I knew I was the only applicant(申请者).I got a lesson from the experience: Something others said was ____ may be not impossible. As long as you believe it, you may make impossible possible.

What ________ I wearing? （    ）