能源、环境与人类的生活和社会发展密切相关．

（1）煤、______和天然气属于化石燃料．为节约化石燃料、减少污染，人类进一步开发新能源，如地热能、核能、______（填一种即可）等．

（2）将煤块粉碎成煤粉后燃烧．其目的是______．

（3）使用乙醇汽油是一种“节能减排”的有效措施．下列关于乙醇作燃料的说法不正确的是______（填选项序号）．

A．乙醇属于可再生能源            B．乙醇汽油不能用作汽车燃料

C．使用乙醇汽油可减少大气污染    D．使用乙醇汽油可节省石油资源

（4）在催化剂作用下，乙醇与氧气、氢氧化钠在燃料电池中反应生成水和另一种常见的物质，同时产生电能，请你完成该反应的化学方程式：C₂H₅OH+3O₂+4NaOH

（5）煤燃烧常会造成环境污染，上图是某燃煤发电厂在高温条件下处理废气中SO₂的装置示意图．整个过程反应的化学方程式是______．

As the pace of life continues to increase, we are fast losing the art of relaxation. (1) you are in the habit of rushing through life, being on the go from morning till night, it is hard to (2) down. But relaxation is (3) for a healthy mind and body.Stress is a (4) part of everyday life and there is no way to (5) it. In fact,it is not the bad thing that it is often supposed to be. A (6) amount of stress is important to provide motivation and give (7) to life. It is only when the stress gets out of control (8) it can lead to poor performance and (9) health.The amount of stress a person can bear(10) very much on the individual. Some people are not afraid of stress, and such (11) are obviously chief material for managerial responsibilities. Others lose heart at first (12) of unusual difficulties. When exposed to stress, in (13) form, we react both chemically and physically. In fact we (14) a choice between escape and fight. But in more ancient days they made the (15) between life and death. The crises (危机)we meet today are (16) to be so extreme,but however little the stress,it requires the same response. It is when such a reaction (17) long，through continued exposure to stress，that health becomes (18) ．Such serious conditions as high blood pressure and heart diseases have (19) links with stress． (20) we canno! remove stress from our lives we need to find ways to deal with it．It would be unwise to do so even it we could．So what do you think of stressWhat is your way to deal with it.

第（7）空应选择（）

A．purpose

B．resource

C．influence

D．instruction