We all know that the normal human daily
cycle of activity is of some 7～8 hours’ sleep alternating with some 16～17 hours’
wakefulness and that, broadly speaking, the sleep normally coincides with the
hours of darkness. Our present concern is with how easily and to what extent
this cycle can be modified.
The question is no mere academic
one. The ease, for example, with which people can change from working in the day
to working at night is a question of growing importance in industry where
automation calls for round-the-clock working of machines. It normally takes from
five days to one week for a person to adapt to a reversed routine of sleep and
wakefulness, Sleeping during the day and working at night. Unfortunately, it is
often the case in industry that shifts are changed every week: a person may work
from 12 midnight to 8 a.
A. Because few people like to reverse the cycle of sleep and wakefulness.
B. Because sleep normally coincides with the hours of darkness.
C. Because people are required to work at night in some fields of industry.
D. Because shift work in industry requires people to change their sleeping habits.
更多"{{B}}TEXT B{{/B}}
We al"的相关试题:
[单项选择] {{B}}TEXT B{{/B}}
We all know that programming language
is the system of syntax, grammar, and symbols or words used to give instructions
to a computer. Because computers work with binary numbers, first-generation
languages, called machine languages, required the writing of long strings of
binary numbers to represent such operations as add, subtract, and compare. Later
improvements allowed octal, decimal, or hexadecimal representation of binary
strings. It is difficult to write error-free programs in machine language; many
languages have been created to make programming easier and faster. Symbolic, or
assembly, languages-- second-generation languages-- were introduced in the early
1950s. They use simple mnemonics such as "A" for add or "M" for multiply, which
are translated into machine language by a computer program called an a
A. it is used in designing software.
B. it is hardware-independent.
C. is should be translated into the computer language by software.
D. it is designed to solve some specific problem.
[单项选择]{{B}}TEXT B{{/B}}
We all know that the normal human daily
cycle of activity is of some 7～8 hours’ sleep alternating with some 16～17 hours’
wakefulness and that, broadly speaking, the sleep normally coincides with the
hours of darkness. Our present concern is with how easily and to what extent
this cycle can be modified.
The question is no mere academic
one. The ease, for example, with which people can change from working in the day
to working at night is a question of growing importance in industry where
automation calls for round-the-clock working of machines. It normally takes from
five days to one week for a person to adapt to a reversed routine of sleep and
wakefulness, Sleeping during the day and working at night. Unfortunately, it is
often the case in industry that shifts are changed every week: a person may work
from 12 midnight to 8 a.
A. the inconveniences brought about to the workers by the introduction of automation.
B. the disturbance of the dally cycle of workers who have to change shifts too frequently.
C. the fact that people working at night are often less effective.
D. the fact that it is difficult to find a number of good night workers.
[单项选择] {{B}}TEXT B{{/B}} We all know that
programming language is the system of syntax, grammar, and symbols or words used
to give instructions to a computer. Because computers work with binary numbers,
first-generation languages, called machine languages, required the writing of
long strings of binary numbers to represent such operations as add, subtract,
and compare. Later improvements allowed octal, decimal, or hexadecimal
representation of binary strings. It is difficult to write error-free programs
in machine language; many languages have been created to make programming easier
and faster. Symbolic, or assembly, languages-- second-generation languages--
were introduced in the early 1950s. They use simple mnemonics such as "A" for
add or "M" for multiply, which are translated into machine language by a
computer program called an assembler. An extension of such a language is the
macro instruction, a mnemonic (such as "READ" ) for which A. it is used in designing software B. it is hardware-independent C. is should be translated into the computer language by software D. it is designed to solve some specific problem
[单项选择] {{B}}TEXT C{{/B}} We all know that the
normal human daily cycle of activity is of some 7-8 hours’ sleep alternating
with, some 16-17 hours’ wakefulness and that, broadly speaking, the sleep
normally coincides with the hours of darkness. Our present concern is with how
easily and to what extent this cycle can be modified. The
question is no mere academic one. The ease, for example, with which people earl
change from working in the day to working at night is a question of growing
importance in industry where automation calls for round-the-clock working of
machines, It normally takes from five days to one week for a person to adapt to
a reversed routine of sleep and wakefulness, sleeping during the day and working
at night. Unfortunately, it is often the case in industry that shifts are
changed every week; a person may work from 12 midnight to 8 a.m. one week, 8
a.m. to 4 p.m. the next, and 4p.m. to 12 midnight the third and so o A. Because few people like to reverse the cycle of sleep and wakefulness. B. Because sleep normally coincides with the hours of darkness. C. Because people are required to work at night in some fields of industry. D. Because shift work in industry requires people to change their sleeping habits.
[简答题]We all know that we should take better care of ourselves, relax more, and have more fun at work (and elsewhere, as well) , but it’s easy to overlook the opportunities to do just that be cause of the daily work priorities that consume our lives. Here are some ideas for learning to take action in your work life.
[单项选择]
Text 2 What we know of prenatal development makes all this attempt made by a mother to mold the character of her unborn child by studying poetry, art or mathematics during pregnancy seem utterly impossible. How could such extremely complex influences pass from the mother to the child There is no connection between their nervous system. Even the blood vessels of mother and child do not join directly. An emotional shock to the mother will affect her child, because it changes the activity of her glands and so the chemistry of her blood. Any chemical change in the mother’s blood will,affect the child ’ for better or worse. But we can not see how a liking for mathematics or poetic genius can be dissolved in blood and produce a similar liking or genius in the child. In our discussion of instincts we saw that there was reason to believe that whatever we inherit must be of some very simple sort rather than any complicated or very definite kind of behavior. It is certai
A. surely become a musician
B. possibly become a-doctor
C. become a’musician on the condition that all these factors are organized around music
[单项选择] Text 1
All that we really need to plot out the
future of our universe are a few good measurements. This does not mean that we
can sit down today and outline the future course of the universe with anything
like certainty. There are still too many things we do not know about the way the
universe is put together. But we do know exactly what information we need to
fill in our knowledge, and we have a pretty good idea of how to go about getting
it.
Perhaps the best way to think of our present situation is to
imagine a train coming into a switchyard. All of the switches are set before the
train arrives, so that its path is completely determined. Some switches we can
see, others we cannot. There is no ambiguity if we can see the setting of a
switch: we can say with confidence that some possible futures will not
materialize and others will. At
A. ways of life
B. marks of cars
C. orbits of planets
D. a course for racing.
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