单选题
It happens to every college student. Every professor
on campus assigns a paper the same week. Volunteer work and social activities
fill the calendar. Before long, an assignment is due in the morning, so what
else is there to do? Brew a pot of coffee and begin another of that most storied
of college traditions: {{U}}the all- nighter.{{/U}} Many college students
have found themselves in this position. Although studying late into the early
hours is a pretty well-accepted part of college life, the scientific consensus
is clear—insufficient sleep is bad for a student's performance, happiness and
health. Sleep is one of the body's most vital processes, affecting
everything from muscle strength to memory span. Sleep increases blood flow to
muscles and repairs damaged cells. A recent study indicates that college
basketball players perform better on the court if they sleep at least ten hours
the night before. Sleep consolidates memories and prepares the brain to
perform—students who get more sleep can improve recall ability and actually do
better on tests. How much sleep a person needs varies, but Dr. William
DeMent from Stanford University says college students need over eight hours per
night. With assignments piling up, many students end up constantly sleep
deprived. Students accumulate a "sleep debt" that can get larger over time and
can only be "paid off" by getting the amount of sleep the body needs. Naturally,
a person's body would force them to get enough sleep by making them feel sleepy.
But caffeine, stimulants, pressing deadlines encourage students to ignore the
body's natural signals and go without sleep far longer than they
should. It's easy to get caught up in the excitement and stress of
college life and to get in the habit of getting to bed later and later. But
pushing bodies and schedules to their limits does not come without cost. In the
short-term, sleep deprivation affects mood, mental ability and physical
performance. It decreases reaction time and makes a person more easily
distracted. That's bad for test taking, and even worse for students who are
driving. In the long-term, not getting enough sleep can sacrifice your health
and shorten your life span by causing irritability, frustration and proneness to
mistakes, associated with high blood pressure, obesity and heart failure. There
are more than enough reasons to {{U}}hit the sack{{/U}} early tonight!
单选题
The expression "all-nighter" in the first paragraph refers to those
students who______.
A. sleep soundly the whole night
B. stay up all night studying
C. spend the night drinking coffee
D. don't come back for the night
【正确答案】
B
【答案解析】
单选题
It can be concluded from this passage that______.
A. sleep is of great importance to college students
B. most college students refuse to go to bed early
C. college students go to bed late only occasionally
D. most colleges force students to work at night
【正确答案】
A
【答案解析】
单选题
The harm that insufficient sleep does to test-takers is that______.
A. they feel sleepy during the test
B. they forget what is learned
C. they become lazy thinkers
D. they are left inattentive
【正确答案】
D
【答案解析】
单选题
This passage implies that sleep deprivation is______among college
students.
A. rare
B. commonplace
C. negligible
D. justified
【正确答案】
B
【答案解析】
单选题
The underlined words in the last paragraph probably mean______.
A. get down to work
B. see a doctor
C. take some medicine
D. go to bed
【正确答案】
D
【答案解析】
单选题
What is this passage mainly concerned with?
A. College students need to improve their work efficiency.
B. Test-takers are to have sufficient sleep before a test.
C. Sleep deprivation has much adverse effect on students.
D. College students should never stay up late working.