根据短文理解，选择正确答案。

    The timer is running. These people have 60 minutes to escape (逃脱) from a room they paid to be locked inside.

    It is a game with clues (线索) that are spread in the room. And there is no starting point. You start wherever you feel like. It is up to you to put the clues together in order to find the key to get out.

    A popular room offered by Timothy Smith in Washington D.C. is designed to mimic (模仿) the Oval Office in the White House. It is built like the office of the American president. The fun part of Escape the Oval Office is that anything here could be a clue to solving the puzzle. An old typewriter from the 1930s. Or the small table in the corner. Or the map of Washington D.C. on the wall. And then there are hidden messages that can only be seen under a black light.

    Sometimes, the telephone rings. “Would you guys like a clue?” The boss controls the game progress on a camera and calls to offer hints (提示) when needed.

    Teams can be made up of classmates, families, tourists, or a group of six friends and two strangers who just meet before the game starts.

    It's said that there are more than 800 Escape Room adventures in Washington D.C.. Each experience has different themes and stories. The rules for playing are similar, and solving the puzzle needs social, physical abilities and quick, creative thinking.

    It was a little stressful. Some of the clues seemed really complex (复杂的). But it was a lot of fun, and the players had no idea what to expect. 

    Escape Room adventure is popular because it gives any person a chance to be a detective or to be a James Bond. However, like most team sports, this game is really all about being a good teammate and having a good time.

    Once I thought love meant flowers, gifts and sweet kisses. So, I really doubted whether there was any love between my parents. Every day they were working hard to pay for my high school. They didn't act in the romantic ways that I read in books and saw on TV, and they certainly didn't send flowers to each other on Valentine's Day (情人节).
    One day, my mother was sewing a quilt (被子). I asked her if there was any love between her and my dad. She stopped and raised her head in surprise. Then she went on with her work without saying anything. I was very worried because I thought I had hurt her feelings. But after a few minutes she said, “Look at this thread (线). Sometimes it appears, but most of the time it disappears in the quilt. If life is a quilt, then love is the thread. It can hardly be seen anywhere or at any time, but it's really there, and makes the quilt long-lasting.” I listened carefully but I didn't understand her until the next spring.
    My mother suddenly got seriously ill and had to stay in hospital for about a month. Every morning and evening after she returned from the hospital, my father helped her walk slowly along our country road. There were many beautiful flowers, green grass and trees, and the sun gently shone through the leaves. All of this made the most beautiful picture in the world. Reading their eyes, I knew they love each other deeply. From this experience, I realized that love is just a thread in the quilt of our lives. Love is inside, making life strong and warm.

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+____ ．