以下关于甲亢术后并发症的描述正确的是A．呼吸困难和窒息多由于排痰不畅 B．喉返神经损

阅读理解。

     A 33-year-old financial analyst in California recently quit his job to devote himself to an unpaid

job teaching math on the Internet, and his lessons are reaching almost 100,000 people a month.

Salman Khan’s voice is heard every day on the net-by tens of thousands of students around the

world who are hungry for help learning math. He has posted 1,200 lessons on YouTube-lessons

that appear on an electronic blackboard, which range from basic addition to advanced mathematics

for science and finance. And they are free.

     Khan lives in Silicon Valley, with his wife, a doctor, and their new baby. He got the idea for his

“Khan Academy” four years ago, when he taught a young cousin how to convert kilograms to grams.

With Khan’s help, the cousin got good at math, and Khan began a new career.

     Now, Khan records his lessons himself, but he never goes on camera. “It feels like my voice in

their head. You’re looking at it and it feels like someone’s over your shoulder talking in your ear, as

opposed to someone at the blackboard, which is distant from you,” he said.

     When Springfield High School in Palo Alto, California invited Khan to speak in person-he

immediately connected to the students there.

     The idea of short lessons that can be played over and over again attracted high school senior

Bridget Meaney. She says she had trouble with math in the seventh grade. “I think the teachers are

good, but they can’t teach at a speed that’s perfect for everyone,” she said. “I like the idea of learning

something in class but then going back and pressing pause or rewind and actually getting a deeper

understanding of it.”

     Originally, Khan kept his lessons short because of YouTube restrictions. Now, he thinks short

is better. “Education researchers now tell me that 10 minutes is how long someone can have a high

level of concentration. And anything beyond that and your brain switches off,” he said.

     For Khan, teaching math, science, and finance is just the beginning. He says he’s ready to expand

his YouTube site to include other subjects as well.

1. What gave Khan the idea of teaching math online?

A. His success in helping his cousin learn math.

B. His discovery that many students found learning math difficult.

C. A suggestion made to him at a local high school.

D. His interest in Internet teaching.

2. Why does Khan never go on camera?

A. He’s too shy to show his face on camera.

B. It’s restricted by YouTube for education videos.

C. He wants to keep distance from the viewers.

D. He wants to create a more relaxed learning atmosphere.

3. From the passage, we know that ________.

A. Khan travels to many schools to promote his lessons

B. Khan plans to include more subjects in the future

C. Khan gives live math lessons every day for free

D. Khan set up the Khan Academy with his wife

4. Why does Bridget Meaney like Khan’s lessons?

A. Khan teaches seventh grade math better than her teacher.

B. The lessons can be watched repeatedly until fully understood.

C. She can perfectly follow the pace of Khan’s teaching.

D. She cannot concentrate when learning in class.

5. What does Khan mean by “short is better” in the 6th paragraph?

A. Keeping the lessons short can ensure better concentration.

B. YouTube recommends short lessons for its site.

C. Short lessons encourage students to return to the website.

D. Students enjoy short mathematics lessons more.

下列关于权利和义务的说法正确的是（）

A．法律权利就是法律关系主体的权利．

B．单向法律关系中，权利人仅享有权利，义务人仅享有义务．

C．权利和义务在数量上都是相等的．

D．国家权利和义务是国家在国际法上所享有的权利和所承担的义务．

根据Fe-Fe₃C相图，完成下列工作：

画出35钢(w_C=0.35%，下同)从高温液态到室温的平衡冷却曲线(不考虑铁素体的溶解度变化)，并标明相的变化过程。

下列选项中，不属于建设工程项目施工总承包管理模式在质量控制方面特点的是( )。

A．各分包之间的关系可由施工总承包管理单位负责，这样就可减轻业主方管理的工作量

B．对分包人的质量控制由施工总承包管理单位进行

C．分包工程任务符合质量控制的“他人控制”原则，对质量控制有利

D．建设工程项目质量的好坏在很大程度上取决于施工总承包单位的管理水平和技术水平

执成方而治病古今之大患也昔人云用古方治今病如拆旧屋盖新房不经大匠之手经营如何得宜诚哉是言昔张仲景先生作伤寒论立一百一十三方言后世必有执其方以误人者甚矣成方之不可执也然则今之女科一书何为而刻乎此书为傅青主征君手著其居心与仲景同而立方与仲景异何言之仲景伤寒论杂症也有五运六气之殊有中表传里之异或太阳太阴不一其禀或内伤外感不一其原或阳极似阴阴极似阳不一其状非精心辨症因病制方断不能易危就安应手即愈此书则不然其方专为女科而设其症则为妇女所同带下血崩调经种子以及胎前产后人虽有虚实寒热之分而方则极平易精详之至故用之当时而效传之后世而无不效非若伤寒杂病必待临症详审化裁通变始无贻误也尝慨后世方书汗牛充栋然或偏攻偏补专于一家主热主寒坚执谬论炫一己之才华失古人之精奥仲景而后求其贯彻灵素能收十全之效者不数数觏读征君此书谈症不落古人窠臼制方不失古人准绳用药纯和无一峻品辨证详明一目了然病重者十剂奏功病浅者数服立愈较仲景之伤寒论方虽不同而济世之功则一也此书晋省钞本甚多然多秘而不传间有减去药味错乱分量者彼此参证多不相符兹不揣冒昧详校而重刊之窃愿家置一编遇症翻检照方煎服必能立起沉疴并登寿域或亦济人利世之一端也夫道光十一年新正上元同里后学祁尔诚谨序（《傅青主女科》祁尔诚序）

作者详校并重刊《傅青主女科》的原因是什么？