1
Traditional views hold that, despite the low radioactivity of depleted uranium used in the manufacture of depleted uranium munitions, it can still lead to chromosomal damage in humans, potentially causing tumors or cancer. However, in a recent study, researchers examined the blood cells of veterans who had been exposed to depleted uranium munitions and found no evidence of chromosomal breaks or duplications, nor any negative health impacts attributed to exposure. Therefore, the researchers believe that the low radioactivity of depleted uranium munitions does not pose a health risk to humans. Which of the following, if true, would most weaken the researchers’ conclusion?
A. Individuals who have not been exposed to depleted uranium munitions can also develop tumors or cancer.
B. Experts in many countries are working to address the radioactivity issues of depleted uranium munitions.
C. Data shows that the offspring of these veterans have a higher rate of congenital defects than the normal population.
D. Residents of a certain area have sued the government, claiming that the military’s testing of depleted uranium munitions has affected their health.
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[Answer] C. Explanation: The premise states that “so far, studies of the blood cells of veterans exposed to depleted uranium munitions have found no negative health impacts due to exposure to depleted uranium munitions,” leading to the conclusion that “the low radioactivity of depleted uranium munitions does not affect human health.” Option C indicates that the offspring of these veterans have a higher rate of congenital defects than normal, which implies an impact on human health, thereby weakening the researchers’ conclusion. Thus, the answer is C.
2
Teacher Ma from the kindergarten is playing a game called “Guess What I Have” with three children: Qingqing, Keke, and Anan. Teacher Ma tells the children: “I have placed a red ball, a yellow ball, and a blue ball in three drawers of this cabinet. Can you guess what color ball is in each drawer? If you guess correctly, you will receive a small red flower!” Then, she asks the children to close their eyes and places the three balls in the drawers. The children’s guesses are as follows: Qingqing says, “The red ball is in the top drawer, and the yellow ball is in the middle drawer.” Keke says, “The red ball is in the middle drawer, and the blue ball is in the top drawer.” Anan says, “The red ball is in the bottom drawer, and the yellow ball is in the top drawer.” The teacher tells them that each of them has guessed half correctly. Where are the red, yellow, and blue balls located in the drawers?
A. The red ball is in the middle drawer, the yellow ball is in the top drawer, and the blue ball is in the bottom drawer.
B. The red ball is in the middle drawer, the yellow ball is in the bottom drawer, and the blue ball is in the top drawer.
C. The red ball is in the top drawer, the yellow ball is in the bottom drawer, and the blue ball is in the middle drawer.
D. The red ball is in the bottom drawer, the yellow ball is in the middle drawer, and the blue ball is in the top drawer.
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[Answer] D. Explanation: Qingqing’s first half of the statement “the red ball is in the top drawer” cannot be true at the same time as Anan’s statement “the red ball is in the bottom drawer” and “the yellow ball is in the top drawer.” Since each person has guessed half correctly, one of Anan’s statements must be true, so Qingqing’s first half must be false, which means Qingqing’s second half is true, placing the yellow ball in the middle drawer; thus, Keke’s first half must be false, and the second half true, placing the blue ball in the top drawer; Anan’s second half must be false, and the first half true, placing the red ball in the bottom drawer. Therefore, the answer is D.
3
When a novel wins an award, its reputation on online bookstores often declines. However, in reality, the scores of other nominated novels in the competition are indeed lower than those of the award-winning novel. Based on this, Xiao Li believes that the judges of the competition cannot select truly good novels. If the following statements are true, which one does not weaken Xiao Li’s viewpoint?
A. The award raises readers’ expectations for the winning novel.
B. After a novel wins an award, the author’s visibility increases rapidly.
C. Winning the award attracts some readers whose tastes do not match the book.
D. Readers who enjoy this type of novel rate the award-winning novel very highly.
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[Answer] B. Explanation: Xiao Li concludes that “the novels that win awards often have a poor reputation on online bookstores” leading to the belief that “the judges cannot select truly good novels.” Option A indicates that readers’ expectations for the winning novel have increased, suggesting that the decline in reputation is due to other reasons, which does not support Xiao Li’s viewpoint. Option B states that the author’s visibility increases after winning the award, but the author’s visibility is not directly related to the novel’s reputation, thus it does not weaken Xiao Li’s viewpoint. Option C indicates that the award-winning novel attracts readers with mismatched tastes, which also suggests that the decline in reputation is due to other reasons, not supporting Xiao Li’s viewpoint. Option D states that readers who enjoy award-winning novels rate them highly, indicating that the judges indeed selected truly good novels, which weakens Xiao Li’s viewpoint. Therefore, the answer is B.
4
During the Six Dynasties, the famous conversationalist Liu Tan spoke a lot, but he also appreciated those who did not speak. He admired Jiang Quan for not often speaking, saying, “Jiang Quan does not speak, and being able to remain silent is truly admirable.” Jiang Quan knew he was not good at speaking, but he understood how to conceal his shortcomings. Not everyone knows where their flaws lie; many who love to teach and talk excessively often annoy others. Therefore, it can be said that Jiang Quan’s behavior is actually a rare kind of wisdom. Which of the following, if true, would most support the above conclusion?
A. Being able to speak and choose not to speak is a rare kind of wisdom.
B. Being unable to speak but able to remain silent is a kind of self-aware wisdom.
C. Being unable to speak and yet speaking is actually a form of exaggeration.
D. Being unable to speak and not speaking is actually a form of helplessness.
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[Answer] B. Explanation: The conclusion in the premise is that “Jiang Quan’s behavior is a rare kind of wisdom.” Jiang Quan’s ability to remain silent is “being unable to speak but able to remain silent,” and option B directly supports the premise. Option A’s “being able to speak and choose not to speak,” and option C’s “being unable to speak and yet speaking” do not support it; option D’s “helplessness” also does not support the premise. Therefore, the answer is B.
5. [Answer] B. Explanation: Xiao Li concludes that “the novels that win awards often have a poor reputation on online bookstores” leading to the belief that “the judges cannot select truly good novels.” Option A indicates that readers’ expectations for the winning novel have increased, suggesting that the decline in reputation is due to other reasons, which does not support Xiao Li’s viewpoint. Option B states that the author’s visibility increases after winning the award, but the author’s visibility is not directly related to the novel’s reputation, thus it does not weaken Xiao Li’s viewpoint. Option C indicates that the award-winning novel attracts readers with mismatched tastes, which also suggests that the decline in reputation is due to other reasons, not supporting Xiao Li’s viewpoint. Option D states that readers who enjoy award-winning novels rate them highly, indicating that the judges indeed selected truly good novels, which weakens Xiao Li’s viewpoint. Therefore, the answer is B.
Data shows that after the implementation of the “No Child Left Behind” act, the average scores of fourth and eighth-grade students in English reading and mathematics have significantly improved. Therefore, the conclusion is drawn that this educational reform act has achieved remarkable success in elementary and middle schools across the United States. Which of the following, if true, would weaken the argument the least?
A. The average score of twelfth-grade students in English reading has significantly declined during the same period.
B. Focusing only on the changes in English reading and mathematics scores and using them as a measure of educational reform achievements is very one-sided.
C. Improving the education system is indeed very difficult, and making changes in this large, inert bureaucratic system requires a lot of money, effort, and time.
D. The average scores of fourth and eighth-grade students in English reading and mathematics have been increasing at a similar rate since the 1990s, a trend that began before the act was passed.
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[Answer] C. Explanation: The premise states that “after the act was implemented, the average scores of fourth and eighth graders in English and mathematics improved,” leading to the conclusion that the educational reform act has achieved remarkable success. Option A indicates that the twelfth-grade English reading scores have significantly declined, which questions the act’s success; option B points out that focusing solely on English reading and mathematics scores is one-sided, thus also effectively questioning the act’s effectiveness; option D indicates that the improvement in these two subjects’ scores had already begun before the act was implemented, which also raises doubts; only option C is unrelated and does not question the argument. Therefore, the answer is C.
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