畜舍自然采光受那些因素影响？

有2300个移动通信基站在地震中受损，一些受灾严重的地区通信完全中断．在地震中受创的不仅仅是中国移动．据悉，中国联通在陕西靠近四川地区的约500个基站中断；西安至成都的2条长途光缆中1条中断．汶川地震后人们发现卫星通信的重大作用．通信卫星大多是相对地球“静止”的同步卫星，在地球周围均匀地配置3颗同步通信卫星，就覆盖了几乎全部地球表面，可以实现全球通信．

请回答：

（1）关于光纤通信，小明同学曾思考这样的问题：在漫长的线路上，光纤免不了要拐弯、缠绕，而光在同种均匀介质中是沿直线传播的，激光通信信号怎能从一端传到另一端呢？后来在“研究光纤怎样传输光信号”的活动中，终于明白了：激光信号在光纤中______

A．就像水流沿弯曲水管流动那样      B．就像电流沿弯曲导线传播那样

C．不断地经光纤壁反射而向前传播    D．不断地在光纤中折射而向前传播

（2）除了卫星通信外，你还知道哪些现代通信方式？（说一个即可）

某中年女患者服用大量农药企图自杀，被人送至某专科医院时呼吸已停止，马上对病人进行洗胃但无效。在没有其他有效措施条件下，急诊医生采用了在当时还没有推广的人工肾透析治疗法进行抢救，收到了很好的疗效。本案例中，为了抢救病人，采用了试验性治疗。对此做法下面说法错误的是

A．是符合医学道德的医学行为

B．即使是抢救成功，也不合乎道德规范

C．医生的选择是正确的

D．动机是好的，但得失结果一时难以下结论

E．即使不幸造成死亡或伤残，也不能逆推动机不好

London ［2009-4-01］—In the first  

meeting between Chinese President  

Hu Jintao and US President Barack  

Obama  prior to the Group of 20      

summit in London, the two leaders pledged that both countries will be working together to help the world resist the financial crisis.   

China and the US have agreed to prioritize（使……更重要; 优化） the two countries’  relations by establishing the new strategic economic dialogue.

The two teams will be headed by Vice Premier Wang Qishan and State Councilor Dai Bingguo from the Chinese side and Secretary of State Hillary Clinton and Treasury Secretary Timothy Geithner from the US side.

President Hu Jintao and US President Barack Obama made the announcement to the press before they went into the official meeting, their first, at Winfield House, residence of the US ambassador to the UK.

Although it is their first meeting, they have kept a close contact, which Obama said will  “set the stage” for both countries  “to tackle the challenges in the years to come. ”

Both presidents highlighted the importance of China-US relations, especially during the current economic crisis.

Obama said he hoped their meeting will be constructive and open not only about the whole state of the world economy during the current crisis, but to the efforts to improve peace and security for both countries and the world.

Hu said all the positive results the two countries have achieved have not come easily, adding that he hoped to develop good working relationship and personal friendship with Obama.

Sino-US relations are of fundamental interests not only to both countries, but to peace, stability and prosperity to Asia and the world.

小题1:What is the best title of this passage?

A．Hu, Obama set up new economic dialogue.

B．Sino-US relations will be improved.

C．China and the US are working together to resist economic crisis.

D．China and the US have achieved positive results.小题2:How do China’ s and US’ s presidents think they should deal with their relations?

A．By trusting and helping each other.

B．By sharing their common interests.

C．By establishing the new strategic economic dialogue.

D．By establishing new economic policy.小题3: What is Winfield House?

A．The US ambassador to the UK.

B．Residence of UK ambassador to the US.

C．The living place of US ambassador to the UK.

D．The residence of British Queen.小题4: All of the following are mentioned EXCEPT____.

A．The two presidents agreed to work together to resist the financial crisis

B．The two presidents announced to the press before the official meeting

C．Both countries will make efforts to improve peace and security

D．Sino-US relations are of fundamental interests only to both countries

某3岁男孩，冬季发病，发热2天。体温持续在39℃左右，流涕，轻微咳嗽，无痰，睡眠不宁，时有惊惕，饮食尚可，二便正常。心肺（-），腹部正常，神经系统无异常。

如果诊断本病为感冒夹惊，那么对于感冒夹惊而言，最不容易混淆的一个诊断是（）

A.咳嗽

B.哮喘

C.肺炎喘嗽

D.急惊风

E.小儿夜啼

急性高钾血症引起的顽固性心室颤动，低血钙或应用钙拮抗剂中毒者，可给予（）

A.肾上腺素（0.5~1.0mg）

B.阿托品（0.6~2.0mg）

C.胺碘酮［150~500mg静脉滴注，10mg/（kg·D.静脉滴注］

D.10%葡萄糖酸钙5~10ml静脉滴注

E.异丙基肾上腺素（15~20μg／min）