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二氧化碳是全球气候变化的主要罪魁祸首,为消除二氧化碳的污染并使其转变为有用物质,全世界的化学科学家做了大量的研究.科学家找到了一种名叫二硒化钨的金属化合物,通过处理,在阳光作用下,使二氧化碳较易分解成一氧化碳和氧气,用一氧化碳可轻松获得多种能源物质.如CO和H2可以合成甲醇.

在10L的密闭容器中按物质的量之比1:2充入CO和H2,若充有10molCO发生反应:CO(g)+2H2(g)⇌CH3OH(g).

测得平衡时CO的转化率隨温度变化及压强的变化如图所示:

p2、T2时,n(CO)随时间的变化如表所示:

t/min

0

1

3

5

n(CO)/mol

10

7

5

5

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How Important Is Fashion?

    Is looking fashionable more important than being comfortable? Many people seem to think so, judging by the things they wear. But fashion is not everything. It is more important to be a healthy and good person.

    People go to great lengths to be fashionable. Some people think they have to have a certain body type, so they go on extreme, unhealthy diets in order to change their bodies. In addition, many women wear uncomfortable fashions, such as high-heeled shoes that create blisters(水泡), tight body shapers that limit blood flow, and sticky false eyelashes. Men and women alike spend time and money on products that change their natural hair color and use hot irons and blow dryers to curl or straighten their hair. Some people spend several hours a day in front of a mirror. Is fashion important enough to spend so much time and effort on changing how you look like?

    If the purpose of fashion is to make a person feel good, it does not make sense that he or she would go through so much discomfort to be fashionable. Fashion should not come first. People should prioritize(优先考虑)being healthy and positive. What people wear does not indicate anything about their personalities. Instead of spending hours choosing a suit, perhaps you should call your friends and do something together! Instead of going on strict diets and starving, why not eat some healthy foods and then exercise? By doing these things, you can keep a healthy lifestyle and truly grow as a person.