题目内容
（请给出正确答案）
[单选题]
Do you think we should_____the price？
A.demand
B.need
C.want
D.lower
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.demand
B.need
C.want
D.lower
如果结果不匹配，请 联系老师 获取答案
更多“Do you think we should_____the…”相关的问题
A.If he carries on driving like that, he will end up dead
B.Some researchers think most American people would end up to lose under the new tax plan
C.She fled with her family during the war and ended up in a remote village
D.If you do not study for the exam, you will definitely end up with a poor score
A、I work very hard
B、He is kind and patient
C、You are welcome
D、Certainly not
Researchers have established that when people are mentally engaged, biochemical changes occur in the brain that allow it to act more effectively in cognitive areas such as attention and memory. This is true regardless of age.
People will be alert and receptive if they are faced with information that gets them to think about things they are interested in. And someone with a history of doing more rather than less will go into old age more cognitively sound than someone who has not had an active mind.
Many experts are so convinced of the benefits of challenging the brain that they are putting the theory to work in their own lives. “The idea is not necessarily to learn to memorize enormous amounts of information,” says James Fozard, associate director of the National Institute on Again. “Most of us don't need that kindof skill. Such specific training is of less interest than being able to maintain mental alertness.” Fozard and others say they challenge their brains with different mental skill, both because they enjoy them and because they are sure that their range of activities will help the way their brains work.
Gene Cohen, acting director of the same institute, suggests that people in their old age should engage in mental and physical activities individually as well as in groups. Cohen says that we are frequently advised to keep physically active as we age, but older people need to keep mentally active as well. Those who do are more likely to maintain their intellectual abilities and to be generally happier and better adjusted. “The point is, you need to do both,” Cohen says. “Intellectual activity actually influences brain-cell health and size.”
6. People who are cognitively healthy are those _______.
A、who can remember large amounts of information
B、who are highly intelligent
C、whose minds are alert and receptive
D、who are good at recognizing different sounds
7. According to Fozards argument people can make their brains work more efficiently by _______.
A、constantly doing memory work
B、taking part in various mental activities
C、going through specific training
D、making frequent adjustments
8. The findings of James and other scientists in their work _________.
A、remain a theory to further proved
B、have been challenged by many other experts
C、have been generally accepted
D、are practiced by the researchers themselves
9. Older people are generally advised to ___________.
A、keep fit by going in for physical activities
B、keep mentally active by challenges through specific training
C、maintain mental alertness through specific training
D、maintain a balance between individual and group activities
10. What is the passage mainly about？
A、How biochemical changes occur in the human brain.
B、Why people should keep active not only physically but also mentally.
C、How intellectual activities influence brain-cell health
D、Why people should receive special mental training as they age.
下表显示了1997和1998两年速溶咖啡和烘焙咖啡的零售价格和销售量。
(1)利用这些数据，计算烘焙咖啡需求的短期价格弹性，推导烘焙咖啡的线性需求曲线。
(2)计算速溶咖啡需求的短期价格弹性，推导速溶咖啡的线性需求曲线。
(3)哪种咖啡的短期需求弹性大？为什么是这样？
The table below shows the retail price and sales for instant coffee and roasted coffee for 1997 and 1998.
a. Using this data alone, estimate the short-run price elasticity of demand for roasted coffee.Derive a linear demand curve for roasted coffee.
b. Now estimate the short-run price elasticity of demand for instant coffee. Derive a linear demand curve for instant coffee.
c. Which coffee has the higher. short-run price elasticity of demand？ Why do you think this is the case？
A.see
B.think
C.suppose
D.believe
21. A.relax
B.went down
C.fear
D.themselves
E. with
22. A.relax
B.went down
C.fear
D.themselves
E. with
23. A. relax
B. went down
C. fear
D. themselves
E. with
24. A.relax
B. went down
C. fear
D. themselves
E. with
25.A. relax
B. went down
C. fear
D. themselves
E. with
