生物武器具有的特点，下列表示正确的是（）①致命性、传染性强②具有生物专一性③面积效应

材料一：杨利伟，“航天英雄”荣誉称号和“航天功勋奖章”的获得者。他从小向往军营，从穿上航天服那天起，他就把自己的一切交给了蓝天。他在恶劣的环境中磨砺自己的意志，苦练过硬航天飞行本领，一步一个脚印走下去，终于成功地走向太空。他的成功飞行实现了中 * * 的飞天梦想，向全世界展示了中国人民伟大的创造力和自强不息、勇攀高峰的精神风貌。

材料二：李素丽是北京公交车上一名售票员，虽岗位平凡但仍然兢兢业业。为了干好本职工作，她为自己制订了“四心”服务原则：礼貌待客要热心，照顾乘客要细心，帮助乘客要耐心，热情服务要恒心。她凭着自己出色的服务被评为“全国三八红旗手”，成为全国人民学习的好榜样。

阅读以上材料，回答下列问题：

（1）结合所学内容，谈谈杨利伟和李素丽是怎样实现人生价值的？

___________________________________________________________________________________________

（2）杨利伟和李素丽的青春如此美丽，请谈谈你作为当代中国的青少年，如何才能使自己的青春更美丽？

___________________________________________________________________________________________

You must have seen ads on TV about hair care products （护发用品）. The models have shining hair like jewels （珠宝）. But now to make hair shine is no longer the task of hair care products, because hair can be made into real jewels. Believe it or not, a company called LifeGem in the US turns hair into jewels.

The company is in the business of taking hair from dead people and making it into diamonds （钻石）. The diamonds are for the families to remember the dead people.

Now the company plans to make three diamonds using Beethoven's hair to show their latest technology （技术）. The work will take about 7 months and in the end, Beethoven's long hair will become 3 shining diamonds between 0.5 to 1 carat （克拉）in size.

Since the great musician died in 1827, you may wonder how they got Beethoven's hair. Actually, the hair was given by John Rezniloff, who holds the Guinness World Record for the largest and most valuable collection of celebrities' （名人） hair. His collection also includes hair of Napoleon, Albert Einstein,  Abraham Lincoln and John F. Kennedy. In total,  the collection is worth over 5 million dollars.

Though it sounds unbelievable （难以置信）, to have such diamonds made with hair may be a good way to show respect （尊敬） and love to those who died.

小题1:What does the company of LifeGem do?

A．It buys shining hair.

B．It produces hair care products.

C．It uses hair to make jewels.

D．It sells expensive diamonds to famous people.小题2:Why does the company decide to make diamonds out of Beethoven's hair?

A．To show the latest technology.

B．To make the biggest diamond.

C．To make the most shining diamond.

D．To help the dead people become famous.小题3:How long will the work take?

A．Half a month.

B．One month.

C．Three months.

D．Seven months.小题4:What does the underlined word "it" refer to?

A．The collection of celebrities' hair.

B．The making of hair care products.

C．To make diamonds with hair.

D．The Guinness World Record.

小儿麻醉中常见的并发症是（）。

A.呼吸紊乱

B.误吸

C.喉痉挛

D.药物逾量和液体过量

E.缺氧

社会医学是（）

A.社会科学的一门分支学科

B.理论学科

C.临床医学的分支学科

D.交叉学科，边缘学科

E.以上答案均不是

垂直掏槽中的空眼起（）的作用。