问题 问答题

为精确测量世界屋脊--喜马拉雅山的高度,2005年中国科学院组织科考队利用现代测量技术对喜马拉雅山主峰峰顶进行重新测量.测量考察中,科考队员们戴着墨镜,身穿防寒羽绒服,背着氧气瓶,手拿尖头冰镐,脚蹬防滑靴.他们不畏艰难险阻,克服重重困难,终于在5月下旬完成了测量任务.根据以上情景,请你提出两个问题,并从物理学角度加以简答.

例:问题:科考队员为什么要使用尖头的冰镐?

简答:使用尖头冰镐,可以增大对封冻雪地的压强.

问题1:______?

简答:______.

问题2:______?

简答:______.

答案

问题1:墨镜的作用是什么?(为什么他们要戴墨镜呢?)

简答:高山上白雪皑皑,阳光反射强烈,戴墨镜可防止强光伤眼.

问题2:他们为什么要背氧气瓶?(氧气有什么作用?)

简答:高山上气压低,空气稀薄,缺氧.

问题3:防寒羽绒服有什么作用?

简答:高山上气温低,羽绒是热的不良导体,可起到保暖作用.

问题4:防滑靴有什么作用?

简答:防滑靴可增大摩擦,便于登山.

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

How to keep healthy and be happy

 小题1: Who wouldn’t want to know how to be joyful and enjoy good health?

 小题2: Try to follow the food pyramid(金字塔). Eat a lot of fresh fruits or vegetables, some whole grains and fiber, a little bit of dairy, a little bit of meat, and very little sugar and fat.

 小题3: To exercise you can run, do sit-ups, push-ups, etc., lift weights, walk around your neighborhood.

 小题4: It is best to get at least seven hours of sleep a day because lack of sleep can harm your health. To form a regular sleep habit, go to bed at the same time each night and wake up at the same time each morning. It may seem hard at first, but it will get easier after you’ve done it for a while.

Keep yourself busy. This is good because it prevents you from having bad habits, such as smoking and taking drugs. It is also important to keep busy with positive tasks.  小题5: To keep yourself busy you can work around the house, spend time with your pets. Write in a journal, do a sport, or spend time doing a hobby you enjoy.

Remember that nothing is worth sacrificing(牺牲)health and happiness for, so avoid anything that destroys them. Do not do anything harmful to yourself such as doing drugs, smoking, or hanging around and being influenced by negative people.

A.Be social and have friends.

B.Good health and happiness are important goals in life.

C.Eat balanced meals.

D.Worrying is harmful, and work is good for the mind as well as the body.E. Take some exercise regularly.

F. Make sure you get eight hours of sleep daily.

G. Form regular sleep habits.

名词解释