问题 单项选择题

日本有机蔬菜的认证条件非常苛刻,要求种植有机蔬菜的土地3年以内没有使用过任何农药、化肥。日本有机蔬菜的售价只比普通蔬菜高20%~30%。而在中国,有机蔬菜的价格是普通蔬菜的数倍甚至10倍。这说明,中国的有机蔬菜种植业是暴利行业。
以下哪项陈述是上述结论需要假设的

A.日本普通蔬菜的价格没有偏高。
B.中国的有机蔬菜不比日本有机蔬菜的种植成本高。
C.中国人对食品安全的普遍担忧导致有机蔬菜供不应求。
D.中国普通蔬菜的价格是完全市场化的,其利润率是正常的。

答案

参考答案:B

解析: 题干论证的结论是“中国的有机蔬菜种植业是暴利行业”,显然为保证论证的合理性,需要假设该行业确实有较高的利润。B能说明中国的有机蔬菜种植成本较低,但是收益非常高,显然存在很高的利润,所以是题干论述所需要假设的。正确答案为B。

选择题
单项选择题

Weak dollar or no, $ 46,000-the price for a single year of undergraduate instruction amid the red brick of Harvard Yard-is (1) But nowadays cost is (2) barrier to entry at many of America’s best universities. Formidable financial-assistance policies have (3) fees or slashed them deeply for needy students. And last month Harvard announced a new plan designed to (4) the sticker-shock for undergraduates from middle and even upper-income families too.

Since then, other rich American universities have unveiled (5) initiatives. Yale, Harvard’s bitterest (6) , revealed its plans on January 14th. Students whose families make (7) than $60,000 a year will pay nothing at all. Families earning up to $ 200,000 a year will have to pay an average of 10% of their incomes. The university will (8) its financial- assistance budget by 43%, to over $ 80m.

Harvard will have a similar arrangement for families making up to $180,000. That makes the price of going to Harvard or Yale (9) to attending a state-run university for middle-and upper-income students. The universities will also not require any student to take out (10) to pay for their (11) , a policy introduced by Princeton in 2001 and by the University of Pennsylvania just after Harvard’s (12) . No applicant who gains admission, officials say, should feel (13) to go elsewhere because he or she can’t afford the fees.

None of that is quite as altruistic as it sounds. Harvard and Yale are, after all, now likely to lure more students away from previously (14) options, particularly state-run universities, (15) their already impressive admissions figures and reputations.

The schemes also provide a (16) for structuring university fees in which high prices for rich students help offset modest prices for poorer ones and families are less (17) on federal grants and government-backed loans.

Less wealthy private colleges whose fees are high will not be able to (18) Harvard or Yale easily. But America’s state-run universities, which have traditionally kept their fees low and stable, might well try a differentiated (19) scheme as they raise cash to compete academically with their private (20) . Indeed, the University of California system has already started to implement a sliding-fee scale.

5()

A.different

B.same

C.similar

D.encouraging