223.Purcbred cows native to Mongolia produce, on average, 400 liters of milk per year, if Mongolian cattle are crossbred with European breeds, the crossbred cows can produce, on average, 2,700 liters per year. An international agency plans to increase the profitability of Mongolia s dairy sector by encouraging widespread crossbreeding of native Mongolian cattle with European breeds.
Which of the following if true, casts the most serious doubt on the viability of the agency’s plan?
(A) Not all European breeds of cattle can be successfully bred with native Mongolian cattle. (B) Many young Mongolians now regard cattle raising as a low-status occupation because it is less lucrative than other endeavors open to them. (C) Mongolia s terrain is suitable for grazing native herds but not for growing the fodder needed to keep crossbred animals healthy. (D) Cowhide and leather products. not milk, make up the bulk of Mongolia s animal product exports to Europe. (E) Many European breeds of cattle attain average mild production levels exceeding 2,700 liters. 此题目答案是C,但是为什么A不行呢?A不是也削弱了Agency plan的可行性么,交配失败,牛奶高产量无法得到保证? 226.Canadians now increasingly engage in “out-shopping,” which is shopping across the national border, where prices are lower. Prices are lower outside of Canada in large part because the goods-and-services tax that pays for Canadian social services is not applied. Which one of the following is best supported on the basis of the information above? (A)If the upward trend in out-shopping continues at a significant level and the amounts paid by the government for Canadian social services are maintained, the Canadian goods-and-services tax will be assessed at a higher rate. (B)If Canada imposes a substantial tariff on the goods bought across the border, a reciprocal tariff on cross-border shopping in the other direction will be imposed, thereby harming Canadian businesses. (C)The amounts the Canadian government pays out to those who provide social services to Canadians are increasing. (D)The same brands of goods are available to Canadian shoppers across the border as are available in Canada. (E)Out-shopping purchases are subject to Canadian taxes when the purchaser crosses the border to bring them into Canada. 这道归纳题的答案为什么是A呢?文章只说了在边境处价钱低是因为免除商务税,怎么能推出A呢?
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