将基础设施视为“公共物品”，其原因在于（）A、它主要是政府进行投资的 B、社会发展离不

下列各句中，有语病的一句是(    )

A．采集奥林匹克圣火的唯一方式是利用凹面镜集中阳光来引燃火种，因而只有用传统方式取来的火种，才能象征奥运圣火的纯洁。

B．一些官员因腐败事件被网络曝光而结束政治生涯，“网络 * * ”不断出现在公众的视线中，再成热词。

C．2014年6月底，我国将出台实施网络实名登记制度。这一国内互联网发展的重要政策，在网上引起多方关注。

D．某些营养素的过量摄入易引发疾病，如淀粉类或脂肪类营养素摄入过多，就有可能引发肥胖症、脂肪肝等。

西蒙把决策过程分为（）。

A.智力活动、设计活动、选择活动

B.确认阶段、发展阶段、选择阶段

C.知觉活动、逻辑推理、选择活动

D.探索活动、发展阶段、选择阶段

Every year, on the International Volunteers Day, the world thinks highly of the work of millions of people who give their time to help others. The work they are doing is important. As Kofi Annan, Secretary General of the United Nations said“…each contribution—no matter how small—can help make a difference.” Lu Hao and Meng Yu are just two examples of the 13.5 million young Chinese Volunteers who want to make a contribution to society.

Lu Hao is a middle school student, who joined the “1 helps 1” scheme¹ of the Youth Volunteer Community Development Project last year. Every Tuesday and Friday he visits an elderly gentleman who lives alone. “Mr. Zhao is weak and cannot do much for himself, so I help with shopping, do jobs in the house, or read the newspaper to him. With his help, Mr. Zhao’s health has improved, and he feels more energetic. Lu Hao has also found their relationship beneficial2. In the past history was his weakest subject, but it is one which greatly interests Mr. Zhao and they often discuss it. Mr. Zhao has encourages Lu Hao to study history lessons harder and his grades have improved a great deal.

Meng Yu is studying for her master’s degree in Canada. She has a busy timetable, but still finds time for voluntary activities during the weekends. “Last month I took part in an event to help starving children in some of the least developed countries. Twenty-two of us went without food for 30 hours! It was a challenge. We wanted to improve awareness3 of hunger because every day children are dying of starvation. It was a great success. The local newspaper and TV reported it and we received many money.” Meng Yu and her classmates organized this activity to raise money for a good cause, and in the process she formed strong friendships.

Lu Hao and Meng Yu are helping to make other people’s lives better, and they also make great friends, gain new skills and increase their chances of getting the job of their dreams. Would you like to make a difference by becoming a volunteer?

阅读短文，回答问题。

小题1:According to the text, what is the reason why young people choose to do voluntary work?

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小题2:Lu Hao has chosen to volunteer on two evenings every week . How has Meng Yu chosen to give her time? Why has she made a different choice?

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小题3:What benefits has his voluntary work brought Lu Hao?

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小题4:What benefits did MengYu’s voluntary work bring the starving children?

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与血的生成关系最密切的脏腑是（）

A.肝肾

B.肝脾

C.脾胃

D.肺肾

E.心肺

呼吸衰竭患者，动脉血气分析： PaO₂ 50 mmHg，PaCO₂ 90 mmHg，较合适的吸氧浓度是：（）

A．10%～20%

B．24%～28%

C．30%～40%

D．40%～60%