扑救轻金属钠、锌、镁等火灾的最佳灭火剂是（）.A.特殊干粉 B.二氧化碳 C.水

下列事件的先后顺序是

①雅尔塔会议召开   ②苏德战争爆发 ③日本偷袭珍珠港   ④诺曼底登陆

A．①②③④

B．③①④②

C．②③④①

D．②④①③

缓解学习压力的有效方法有很多，下列选项不属于此类有效方法的是[ ]

A．培养学习兴趣

B．明确学习目的

C．想办法逃避学习压力

D．学会将学习压力转化为动力

最早提出“五软”之称的医籍是

A．《小儿药证直诀》

B．《幼幼新书》

C．《婴童百问》

D．《保婴撮要》

E．《医宗金鉴》

下列花卉植物中，于清晨开花的是（）

A.牵牛

B.半支莲

C.月见草

D.紫茉莉

Losing a job or not being able to find one almost always brings unwelcome changes. If you’’ve lost a job, the first feeling is often one of shock. On top of the loss of income, many people find the whole routine of their life is shattered, their contact with other people reduced, their ambitions halted and their identity as a worker removed.There may be good feelings too — it’’s nice to be able to lie in bed in the morning, to spend more time with children, or to have more time to think — a better job may be just around the corner. But, unless a better job does turn up, chances are the days start getting longer and the time becomes harder to fill. Many people pass through periods of difficulty in sleeping and eating. They feel irritable and depressed, often isolated and lonely.Despite all these problems, unemployment can be a chance for a fresh start. You can discover that it provides an opportunity to sort out or rethink what you want from life and how best you can get it. You can use the time to plan how to find a new job, learn a new skill, develop your hobbies, see if you can run your own business, do some voluntary work in your community or meet new people. It’’s up to you.

The author’s purpose is to________.

A．give the basic facts of unemployment

B．explain the reasons of unemployment

C．introduce new jobs to the unemployed

D．offer encouragement to the unemployed