What kind of human being will the future spaceman be?
Will he need bones of steel and powerful muscles to resist rocket thrust，the lungs of a glass blower，a mighty heart，the calmness of an acrobat，unconscious death urges，or a schizophrenic(患精神分裂症的)drove toward isolation? Popular ideas of a spaceman tend to be funny composites of fiction and fact.
A more realistic portrait emerges from the young science of bioastronautics，the newest and strangest of medical disciplines.The astronaut may be described as a young man of high intelligence who is normal to an abnormal degree.On earth he may well have been a high diver，high jumper，polevaulter，or acrobat.He must be highly motivated，carefully trained，and he must want to come back.
His heart and lungs must be healthy but need not be exceptionally developed，for his cabin will be pressurized.Huge muscles may actually be disadvantageous，for he will have almost no way to get exercise，and he will find that the strength of a yearold child is adequate in the weightlessness of space.A firm body and a short， strong neck will help him to withstand(抗拒;经得起……)the tremendous forces encountered at takeoff.Most important physically，his digestive system must be one that will not be upset by weightlessness;he must not be subject to motion sickness.
() 41.All the following are popular beliefs about the future spaceman EXCEPT that .
A.faced with isolation，he is brave enough and not liable to go mad
B.he needs to have a strong death complex
C.he must have strong bones and powerful muscles
D.he must be coolheaded
() 42.Which of the following is NOT be considered by the author as a more realistic image of the future spaceman?
A.He must have superior intelligence.
B.He is young.
C.He should have a strong desire to survive.
D.He doesnt get upset easily.
() 43.Bioastronautics is mostly related to .
A.literature
B.the science of medicine
C.biology
D.disciplines and regulations
() 44.“normal to an abnormal degree”(Para.3)means .
A.seemingly normal but actually abnormal
B.so ordinary that he is undistinguished in every way
C.extremely healthy，and there is nothing abnormal with him
D.so normal that no one believes it is true
() 45.To the future spaceman，what is most physically important is that .
A.his vital capacity must be as great as a glass blowers
B.he must have a short and firm neck
C.his heart must be comparatively large
D.his digestive system should not be upset by weightlessness
Passage Three
With fifteen years Britain and other nations should be well on with the building of huge industrial complexes for the recycling of waste.The word rubbish could lose its meaning because everything which goes into the dumps would be made into something useful.Even the most dangerous and unpleasant wastes would provide energy if nothing else.
The latest project is to take a city of around half a million inhabitants and discover exactly what raw materials go into it and what go out.The aim is to find out how much of these raw materials could be provided if a plant for recycling waste were built just outside the city.This plant would recycle not only metal such as steel，lead and copper，but also paper and rubber as well.
Another new project is being set up to discover the best ways of sorting and separating the rubbish.When this project is complete，the rubbish will be processed like this：First，it will pass through sharp metal bars which will tear open the plastic bags in which rubbish is usually packed;then it will pass through a powerful fan to separate the lightest elements from the heavy solids;after that founders and rollers will break up everything that can be broken.Finally，the rubbish will pass under magnets(磁铁)，which will remove the bits of iron and steel;the rubber and plastic will then be sorted out in the final stage.
The first fullscale giant recycling plants are perhaps fifteen years away.Indeed，with the growing cost of transporting rubbish to more distant dumps，some big cities will be forced to build their own recycling plants before long.
() 46.The phrase “should be well on with…”(Para.1)most probably means .
A.have completed what was started
B.get ready to start
C.have achieved a great deal in
D.put an end to
() 47.What is NOT mentioned as a part of the recycling process described in paragraph 3?
A.Breaking up whatever is breakable.
B.Sharpening metal bars.
C.Separating light elements from the heavy ones.
D.Sorting out small pieces of metal.
() 48.Whats the main reason for big cities to build their own recycling plants?
A.To deal with wastes in a better way.
B.To protect the environment from pollution.
C.To get raw materials locally.
D.To get big profits from those plants.
() 49.The first fullscale huge recycling plants .
A.began to operate fifteen years ago
B.will probably take less than fifteen years to build
C.will be built fifteen years later
D.will probably be in operation in fifteen years
() 50.The passage is mainly about .
A.a cheap way to get energy
B.the location of recycling plants
C.new ways of recycling wastes
D.the probability of city environment