单项选择题
Currently, the number of first-time admissions of individuals diagnosed as manic-depressives to hospitals in Great Britain exceeds by nine times the number of admissions of such patients to public and private hospitals in the United States, even though the population size of the United States is many times that of Great Britain.
Which of the following, if true, would be most useful to an attempt to explain the situation described above ？（）
A．The term manic-depressive refers to a wider range of mentally ill patients in Great Britain than it does in the United States.
B．The admission rate in the United States includes those individuals who visit clinics for the first time as well as those who are admitted directly to hospitals.
C．A small percentage of patients diagnosed as manic-depressive in Great Britain are admitted to private nursing homes rather than hospitals.
D．The variety of training institutions in psychology in the United States is greater than in Great Britain, reflecting the variety of schools of psychology that have developed in the United States.
E．Seeking professional assistance for mental health problems no longer carries a social stigma in the United States, as it once did.
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单项选择题
Sixty adults were asked to keep a diary of their meals, including what they consumed, when, and in the company of how many people. It was found that at meals with which they drank alcoholic beverages, they consumed about 175 calories more from nonalcoholic sources than they did at meals with which they did not drink alcoholic beverages. Each of the following, if true, contributes to an explanation of the difference in caloric intake EXCEPT （）
A．Diners spent a much longer time at meals served with alcohol than they did at those served without alcohol.
B．The meals eaten later in the day tended to be larger than those eaten earlier in the day, and later meals were more likely to include alcohol.
C．People eat more when there are more people present at the meal, and more people tended to be present at meals served with alcohol than at meals served without alcohol.
D．The meals that were most carefully prepared and most attractively served tended to be those at which alcoholic beverages were consumed.
E．At meals that included alcohol, relatively more of the total calories consumed came from carbohydrates and relatively fewer of them came from fats and proteins. -
单项选择题
Which of the following can properly be concluded from the data presented in the graph -
单项选择题
Which of the following, if true, gives the best explanation for the growing disparity in the earning levels of the two groups in the graph presented above
