手摇齿轮油泵的操作方法是（）A、手摇把柄与压缩机旋转同方向 B、手摇把柄与压缩机旋转反

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.

圆锥的底面是个______，圆锥的侧面是个曲面，展开后得到一个______．

( )可在失效日之前一段规定时间内行权。

A．美式权证

B．欧式权证

C．百慕大式权证

D．亚式权证

下列过程质量问题中，一般可不作专门处理的情况有( )

A．混凝土结构出现宽度不大于0.3mm的裂缝

B．混凝土现浇楼面的平整度偏差达到8mm

C．某一结构构件截面尺寸不足，但进行复核验算后能满足设计要求

D．某基础的混凝土28d强度不到规定强度的30%

E．混凝土结构表面出现蜂窝、麻面

某市某区人民检察院原检察长陈某从 2001年起，与其妻汪某感情不合，随着时间的推移，矛盾不断加深，夫妻感情恶化，到了2008年 9月28日晚，陈某决意杀死汪某。之后，陈某趁汪某冲澡之机，将安眠药溶化于水杯中，待汪某洗完澡后让汪某服下。次日凌晨4时许，陈某见汪某已熟睡，便找来绳子将汪某手、腿捆绑，用刀在汪某胸、腹部刺了21刀，致其心、肺、脾破裂后失血性休克死亡。在刑事诉讼中，此案应由哪个机关立案侦查( )

A．公安局

B．国家安全局

C．人民检察院

D．纪委