" Part of a research study, by scientists at McMaster university, which is ongoing into the influence of drinking milk after heavy weightlifting, has observed that milk helps exercisers burn more fat. The scientists took three groups of young men 18 to 30 years of age,56 in total, and put them through a strict, fivedayperweek weightlifting program over a 12week period. Following their workouts, study participants drank either two cups of skim milk (脱脂奶), or a soy beverage with equivalent amounts of protein and energy, or a carbohydrate beverage (碳酸饮料) with an equivalent amount of energy. Upon the study’s conclusion, scientists observed that：the milk drinking group had lost nearly twice as much fat—two pounds—as those in the carbohydrate beverage group, who lost one pound of fat. Those drinking soy lost no fat. At the same time, the gain in muscle was much greater among the milk drinkers than either the soy or carbohydrate beverage participants. As published in the first stage of the study, the milk drinking group came out on top in terms of muscle gain with an estimated 40 percent or 2.5 pounds more muscle mass than the soy beverage drinkers. In addition, this group gained 63 percent or 3.3 pounds more muscle mass than the carbohydrate beverage drinkers. "I think the evidence is beginning to increase, "says Stuart Phillips—the leader of the study."Milk may be best known for its calcium (钙) content in supporting bone health, but our research, and later others’, can continually support milk’s ability to aid in muscle growth and also promote body fat loss. Milk is the ideal postworkout drink for recreational exercisers and athletes alike." " "A-46．According to the study, which is the best drink for exercisers to lose weight?#A.Fruit juice.#B.Soy beverage.#C.Skim milk.#D.Carbohydrate beverage. 47 A-47．From the passage we can learn that milk has a good effect on all of the following EXCEPT________.#A.muscle gain #B.brain development#C.bone health #D.fat loss 48 A-48．According to the passage, we can know that_____.#A.the scientists chose people aged 18,30 and 56 as participants of the research#B.the weightlifting program which study participants attended was 84 days in total#C.people who drink milk every day are always healthier and thinner than others#D.soy beverages are better than carbohydrate beverages for exercisers to gain muscle 49 A-49．What does Philips want to tell us?#A.More evidence is needed to strengthen their research.#B.Milk has more calcium than soy or carbohydrate beverages.#C.The calcium in milk can also help gain muscle and lose fat.#D.Athletes should be forbidden to drink other beverages except milk. 50 A-50．What does the passage mainly talk about?#A.What exercisers should do to lose weight.#B.How milk influences people’s health and figure.#C.The differences between milk and soy or carbohydrate beverages.#D.A research on the effect of drinking milk—gain muscle and lose fat."
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根据Passage Three的内容，以下是每个问题的最佳答案和解释：
A-46．According to the study, which is the best drink for exercisers to lose weight?
答案：C. Skim milk.
**解释：**根据文章，研究发现喝脱脂奶的锻炼者减掉的脂肪比喝碳水化合物饮料或大豆饮料的更多。脱脂奶组的参与者比碳水化合物饮料组多减了1磅脂肪，而大豆饮料组则没有减脂。
A-47．From the passage we can learn that milk has a good effect on all of the following EXCEPT________.
答案：B. brain development.
**解释：**文章提到了牛奶对肌肉增长（muscle gain）、骨骼健康（bone health）和脂肪减少（fat loss）的有益影响，但没有提到它对大脑发育（brain development）的影响。
A-48．According to the passage, we can know that_____.
答案：B. the weightlifting program which study participants attended was 84 days in total.
**解释：**根据文章，参与者的举重训练计划是每周五天，持续12周。12周等于84天。
A-49．What does Philips want to tell us?
答案：C. The calcium in milk can also help gain muscle and lose fat.
**解释：**菲利普斯提到，牛奶除了以其钙含量著称于支持骨骼健康外，研究还表明牛奶有助于肌肉生长和脂肪减少。
A-50．What does the passage mainly talk about?
答案：D. A research on the effect of drinking milk—gain muscle and lose fat.
**解释：**文章的主题是关于牛奶对锻炼者在增肌和减脂方面的效果的研究。它比较了三种不同饮料对肌肉增长和脂肪减少的影响。
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