缓解船员压力的方法包括？（） A.避免船员在船上超期工作而导致的身体上疲惫和精神上的

病理反射的发生的原因是：

A．脑干网状结构受损

B．脊髓反射弧受损

C．基底节受损

D．神经系统兴奋性普遍增高

E．锥体束受损

Visitors from space may have landed on our planet from time to time, maybe hundreds of times during the long, empty ages while Man was still a dream of the far future. Indeed, they could have landed on 90% of the earth as recently as two or three hundreds years ago, and we could never have heard of it. If one searches through old newspapers and records from some certain places, one can find many reports of strange events that could be some explanations about visiting from outer space. A writer, Charles Fort, has made a collection of UFO sightings in his book Lo! One is tempted(引诱) to believe them more than any modern reports, for the simple reason that they happened long before anyone had ever thought of space travel. Yet at the same time, one cannot take them too seriously, for before education on science was popular, even sightings of meteors(流星) and comets(彗星) made people believe the most unbelievable stories, as they still do today.

56.小题1:According to the passage, visitors from outer space may have landed on the earth      .

A．long before man had dreamed of it

B．long before there were human beings

C．in the last few hundred years

D．after the space travel began57.小题2:Which of the following statements is true according to the passage?

A．Charles Fort sighted a lot of UFOs himself.

B．All sightings of UFOs are believable.

C．There may be living things on other planets.

D．People have seen visitors from other planets everywhere.58.小题3:According to the passage,           .

A．UFOs are only seen in recent years

B．UFOs sightings are not new

C．UFOs are just meteors and comets

D．UFOs are invented by people

瘀血的疼痛特点，多为____，痛处____，夜间痛甚。

在决定资产配置过程中，资产管理人必须受制于投资者的资产负债状况。（）

火灾危险出现的最低温度是（）。

A.燃点

B.自燃点

C.闪点

D.爆炸点