大脑是人的思想器官，这个器官和其他人体器官一样，是愈用愈发达，不用则______。A

某地1991-1995年床位发展情况如下：

1995年的环比增长速度为（）

如图所示，均匀光滑球夹在竖直墙和长木板之间静止，长木板的下端为固定转动轴．将长木板从图示位置缓慢地转到水平位置的过程中，小球对竖直墙的压力F₁大小和小球对长木板的压力F₂大小的变化情况将是（   ）

A．F₁、F₂都逐渐减小

B．F₁、F₂都逐渐增大

C．F₁逐渐减小，F₂都逐渐增大

D．F₁逐渐增大，F₂都逐渐减小

血余炭的功效为

A．收敛止血
B．温经止血
C．凉血止血
D．助阳止血
E．补气止血

阅读理解。

     Do you want to live another 100 years or more? Some exports say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span.

     "I think we are knowing at the door of immortality (永生)." said Michael Zey, a Montclair State

University business professor and author of two books on the future. "I think by 2075____________________________ and that's  a conservative estimate (保守估计的).”

     At the conference in San Francisco, Donald Louria, a professor and author at New Jersey Medical

School in Newwark said advances in using genes as well as nanotechnology (纳米技术) make it likely

that humans will live in the future beyond what has been possible in the past. "There is a great push so that people can live from 120 to 180 years." He said. "Some have suggested that there is no limit and that

people could live to 200 or 300 or 500 years." 

     However, many scientists who specialize in aging are doubted about it and say the human body is just

not designed to last past about 120 years. Even with healthier lifestyles and less disease, they say failure of the brain and organs will finally lead all humans to death.  

     Scientists also differ on what kind of life the super aged might live. "It remains to be seen if you pass

120, you know; could you be healthy enough to have good quality of life?" said Leonard Poon, director of the University of George Gerontology Centre. "At present people who could get to that point are not in

good health at all."

1. What is the best title of the passage? (Please answer within 10 words)

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2. Which sentence in the passage can be replaced by the following one? We have got some ideas about living longer.

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3. Please fill in the blank in the second paragraph with proper words or phrases to complete the sentence. (Pease answer with 10 words)

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4. Do you think it is possible for humans to live longer in the future? (Please answer within 30 words)

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5. Translate the underlined sentence in the last paragraph into Chinese.

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井下和井口房内不得从事电焊、气焊和喷灯焊接等工作。如果必须在井下主要硐室、主要进风井巷和井口房内进行电焊、气焊和喷灯焊接等工作，每次必须制定安全措施，并遵守下列规定