请教两道Kaplan的模拟考试题

286的幸福观

第一题，C应该是应该是weaken，professional standards确实影响了admission standards，而题目中说的是这两者没有什么关系。而D说明了admission standards和economic recession是有关联的，而且细读可以发现，结论是偏向最后一句的，即说admission standards和economic recession的关系，这样就可以很快排出答案。

shuxuehai

Rising academic and professional standards are not the primary cause
of today's higher admission standards at many graduate schools. Due to limited
human and physical resources, the schools can only admit a fixed number of
students each year. The increase in admission standards, which has resulted
in lower acceptance rates, is primarily a result of the recent economic recession.

Which of the following, if true, would best support the argument above?

		Many prospective students have been deterred from applying to graduate school because of decreasing acceptance rates.
		Many professionals have lobbied for higher academic standards at graduate schools.
		Many professionals with graduate degrees would not have been admitted to graduate programs had they faced current admission requirements.
		Many first year graduate students cite layoffs and downsizing as the primary reason that they decided to return to school.
		There are twice as many universities offering graduate programs today as twenty years ago. 答案给的是D，我选择的是C。想问下C是直接反对，D还绕了圈子，为什么D还更加好？ In order to learn to speak a foreign language, a person must practice effectively.  The only effective way to practice is by uttering original sentences in that language, rather than reciting memorized ones.  A person can utter such sentences only by first making mistakes in that language that would appear foolish to fluent speakers of the language.   Which of the following conclusions can be properly drawn from the statements above?   People who have learned to speak a foreign language will have appeared foolish to fluent speakers of that language.   People who only recite memorized sentences in a foreign language will never learn to speak that language.   People who have not learned to speak a foreign language have not appeared foolish to fluent speakers of that language. People who do not make mistakes when uttering original sentences in a foreign language do not appear foolish to fluent speakers of that language. When combined with other exercises, reciting memorized sentences in a foreign language can be an effective means of practicing to speak that language. 答案是B我的选择是C。C是很明显的逆否命题吧，为什么不对啊。还有B的话，原文其实是非B推出A，B说的是B推出A，为什么对哦？