Being alone in outer space can be fdghterdng. That is one reason why astronauts on space flight were given plenty of work to keep
.
busy. They were also in constant communication with people on the earth. However, being with people
.
you cannot get away from might be even harder than being alone.
Scientists have studied the reactions of men
.
one another during long voyages. They have found that the longer the voyage ___ (last), the more serious the problem of adjustment is.When men are shut up together for a long period, they begin to feel uneasy.
.
(apparent), although no one wants to be alone all the time, everyone needs some degree of privacy. When people are enclosed together, they are in
.
is called a stress situation.That means that they are under an
.
(usual) amount of pressure or stress.People who are well-adjusted are able to handle stress situations better than others. That is one reason why so much care
.
(take) in choosing our astronauts. These men undergo
.
long period of testing and training. One of the things
.
(test) is their behaviour under stress.
第四部分
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