目前认为格林—巴利综合征的病因是()A．急性细菌感染脊髓 B．脊髓的变态反应性炎症

Part 1

·Read the following passages, eight sentences have been removed from the article.
·Choose from the sentences A-H the one which fits each gap.
·For each gap (1-8) mark one letter (A-H) on the Answer Sheet.
Buzz Aldrin, the second man to walk on the Moon, is a long-time fan of space tourism. Aldrin climbed out of Apollo11 hot on the heels of Neil Armp in 1969. (1)
Together with scientists from Purdue University, the Massachusetts Institute of Technology, and the University of Texas, Aldrin is designing spacecrafts that would perpetually cruise between Earth and Mars. (2) "Some day, people will go to Mars on a regular basis," says team member James Longuski, a professor at Purdue. (3)
The average distance between Mars and Earth is 48 million miles. (4)
It sounds like a trip that would require a lot of fuel. According to the engineers, the cyclers may have a natural, renewable "fuel" supply: from the gravitational forces of the Sun, the planets, and their moons.
As a spacecraft travels close to a planet, its flight path is bent, causing it to whip around the planet and significantly increasing its speed (it’s as if the planet’s gravity gives the passing spacecraft a kick into space). (5) It’s not just science fiction: it might help us get Mars with very little fuel on board, in a journey that would take as little as six to eight months.
"The cycler is essentially in orbit around the Sun and makes regular flybys of Earth and Mars," says James Longuski. "Once you put your vehicle into a cycler orbit, it continues on its own momentum, going back and forth between Earth and Mars. (6)
When the cycler flies by Earth, it will be traveling at a speed of about 13,000 miles per hour.
(7) This is sort of like a bus that doesn’t stop," Longuski says. "When it comes by, you have to run alongside of it and grab on."
AIdrin and his group think that the first cycler could be on its way by as soon as 2018. (8) (It seems a long way off now, but it’s closer than you think!)
Fasten your seatbelts and make sure your seatback is in its upright position. Your flight to space may be departing soon.

• A. These crafts, known as "cyclers", would ferry people and supplies between the two planets, enabling humans to colonize Mars — something that has long been dreamed about in science fiction.
• B. Most people are convinced that we are going to do this; the only question is when.
• C. So, if you’re in middle school now, you could be taking a trip to Mars by the time you’re in your thirties.
• D. To get a sense of just how far this is, try doing this calculation: Given that there are 2,500 miles between New York and Los Angeles, how many times would you have to travel from NY to LA and back to cover the same distance’
• E. Now, at the age of 72, Aldrin is working on a new project that could put more of his fellow humans in space — namely, on journeys to one of our most fascinating neighbors, Mars.
• F. This is the "slingshot" trajectory that you may have seen in movies.
• G. Space taxis will be needed to bring people from the surface of the planet to intercept the cycler.
• H. You may need to carry some propellant for an occasional boost, but it’s pretty much a free trip after that.

一百多年前，一艘远洋船载着五个中国人和几个外国人。途中，除五个中国人外，全病得奄奄一息。经诊断，都患有坏血病。同乘一只船，同样是人，漂洋过海，为什么会有差异？后来发现，中国人有喝茶的嗜好，而外国人却没有。于是得出结论：喝茶是这五位中国人不得坏血病的原因。此结论得出采用的推理方法是（）。

A.求异法

B.求同法

C.共变法

D.剩余法

以下药物具有止血而不留瘀之功效的是

A．侧柏叶、白茅根

B．三七、茜草

C．大蓟、小蓟

D．艾叶、炮姜

E．白及、仙鹤草

将下列地形区与它们所在的阶梯用直线连接起来．

A　第一级阶梯　　　　　　　　①青藏高原

②长江中下游平原

B　第二级阶梯　　　　　　　　③四川盆地

④内蒙古高原

C　第三级阶梯　　　　　　　　⑤东北平原

⑥黄土高原．

县级人民政府根据需要设置（），保障居住分散的适龄儿童、少年入学接受义务教育。

A、寄宿制学校

B、全日制学校

C、小学初中一贯制学校