[单项选择]Humans should not develop their economy at the ______ of the ecological environment.
A. destruction
B. pollution
C. expense
D. mercy

[单项选择]Humans should not develop their economy at the ______ of the ecological environment.
A. destruction
B. pollution
C. expense
D. mercy

[单项选择]

Humans should not try to avoid stress any more than they would shun food, love or exercise.
Said Dr. Hans Selye, the first physician to document the effects of stress on the body. While here‘s on question that continuous stress is harmful, several studies suggest that challenging situations in which you‘re able to rise to the occasion can be good for you.  In a 2001 study of 158 hospital nurses, those who faced considerable work demands but coped with the challenge were more likely to say they were in good health than those who felt they stress that you can manage also boost immune function. In a study at the Academic Center for Dentistry in Amsterdam, researchers put volunteers through two stressful experiences. In the first, a timed task that required memorizing a list followed by a short test, subjects through a gory video on surgical procedures. Those who did well on the memory test had an increase in levels of immunoglobulin A, an antibody that&lsquo
A. the benefits of manageable stress
B. how to avoid stressful situations
C. how to cope with stress effectively
D. the effects of stress hormones on memory

[单项选择]The computer would develop friendships with humans in a (n)______ way.
A. quick
B. unpredictable
C. productive
D. inconspicuous

[单项选择]If a country wants to develop its economy successfully, there has to be a clear______of its social needs.
A. appreciation
B. assurance
C. assumption
D. assessment

[单项选择]Those who think education should serve the economy are of the opinion that _______.
A. all subjects should have some relationship to economics
B. knowledge is to be perceived as preserving a nations cultural history
C. knowledge is to be transmitted
D. students must learn how to be businessmen