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American’s life has once
again been greatly changed by the new age of science and technology since the
Second World War. Everything has speeded up to a tremendous rate. Information is
immediate, nobody has to wait to hear any news. There is a television set in
every house. There is instant printing which has changed the way that offices
and the universities run.
But perhaps the biggest change is the
telephone. People no longer write letters to one another. They pick up the
telephone. Every house has at least two, sometimes three, four and five
telephones. Every office bas many telephones. It speeds things up. And its cost
is not much.
Perhaps the biggest difference is in the growth of
computers. Computers can think, can remember, can calculate faster than any
human brain. A computer can hold more than a million facts in its memory. There
are computers that are so big they would fill this entire au
A. It’s very inexpensive.
B. It saves a lot of trouble.
C. It’s very convenient.
D. A ,B and C
[单项选择]American’s life has once again been greatly changed by the new age of science and technology since the Second World War. Everything has speeded up to a tremendous rate. Information is immediate, nobody has to wait to hear any news. There is a television set in every house. There is instant printing which has changed the way that offices and the universities run.
But perhaps the biggest change is the telephone. People no longer write letters to one another. They pick up the telephone. Every house has at least two, sometimes three, four and five telephones. Every office has many telephones. It speeds things up. And its cost is not much.
Perhaps the biggest difference is in the growth of computers. Computers can think, can remember, can calculate faster than any human brain. A computer can hold more than a million facts in its memory. There are computers that are so big they would fill this entire auditorium with machinery. Businesses and banks are now managed by computers. Part
A. its electronic technology
B. people’s way of living
C. wide use of television
D. its rapidness and efficiency in doing things
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As the school year kicks off, parents are once again struggling to cajole (哄骗) and, if need be, drag their exhausted teens out of bed. That image may make you laugh, but lack of sleep is no joke. (77) Teenagers who don’t get enough rest have more learning, health, behavior and mood problems than students who get at least nine hours a night. Long-term lack of sleep is tied to heart disease, overweight, depression and a shortened life span in adults, indicating the importance of establishing good sleep habits early in life. Lack of sleep can be especially deadly for teens; car accidents are the leading cause of death among teenagers, and safety experts believe sleepy driving is a major factor.
Unfortunately, few teenagers get the sleep they need. In a survey of middle-school and high-school students, University of Colorado researchers found that 82 percent said they woke up tied and unrefreshed, and more than half had trouble concentrating during the day at lea
A. heart disease
B. car accidents
C. skin problems
D. poor concentration