我国政府提出对艾滋病防治实行“四免一关怀”政策的具体内容是什么？

已知x=1是关于x的一元二次方程2x²-x+a=0的一个根，则a的值是（　　）

A．2

B．-2

C．1

D．-1

The Mississippi is the major river system in the United States. The Yangtze is China’s longest river.

Although a world apart, the two waterways share conservation concerns that provide a cultural bridge between students in the United States and China, as well as from around the world.

The Mississippi flows almost 3,800 kilometers from a small lake in Minnesota, gathering the waters of 250 other rivers and streams before reaching the Gulf of Mexico.

In mid-May, as spring flowers began to open, about 41 students from a dozen colleges, mostly in the Midwest, explored a section of the river in Wisconsin and Iowa, to learn about the environment, and each other.

The students, from the U.S., China and around the world, came to join the River Spirit Exchange program.

The cross-cultural educational experience - set up by the University of Wisconsin, Madison-based Environment and Public Health Network for Chinese Students - focuses on the Mississippi and China’s longest river, the Yangtze.

This three day get-together featured story-telling, hiking, camping and canoeing, all part of a larger lesson about conservation projects that can be used on both the Yangtze and Mississippi.

While the students learned about the problems challenging the Mississippi and Yangtze, Jeb Barzen, a wildlife biologist, explained they should also learn about the importance of bridging each other’s culture.

The president of the Environment and Public Health Network for Chinese Students, Xiaojun Lu, said the Mississippi and Yangtze Rivers are uniting these students from opposite ends of the earth.

Organizers say the success and spirit of this first gathering of students will lead to other trips, including one down the Yangtze.

小题1:Where is the source of the Mississippi?

A．Minnesota

B．the Gulf of Mexico

C．Wisconsin

D．Iowa小题2: According to the passage, the get-together             .

A．lasted a week

B．took place in May

C．was held in China

D．was organized by students小题3: According to Paragraph 8, Barzen believes that             .

A．China and the U.S. should work together to protect the environment

B．the Mississippi is more important than the Yangtze to the world

C．cultural exchange between different countries is of great importance

D．the program encourages technical cooperation between China and the U.S.小题4:What is the passage mainly about?

A．A major river system in the United States.

B．The differences between the Mississippi and the Yangtze.

C．An educational program about tourism.

D．An international cultural exchange program.小题5:Where is the passage most probably taken from?

A．A personal diary

B．A news report

C．An official document

D．An advertisement

用于消毒皮肤的氯己定液浓度为（）

A.0.1%

B.0.5%

C.1%

D.2%

E.3%

大片皮肤瘀斑、血肿、关节出血，主要见于（）

A.血小板量的减少

B.血小板质的异常

C.血管舒缩功能障碍

D.凝血因子缺乏

E.肾炎-尿毒症