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61. Physical dependence on certain substances results from _____.
[A] uncontrolled consumption of them over long periods of time
[B] exclusive use of them for social purposes
[C] quantitative application of them to the treatment of diseases
[D] careless employment of them for unpleasant symptoms
[答案] A
[解题思路]
本题可定位于文章第二段的倒数第二句话“Repeated use of a substance can also lead to physical addiction or substance dependence”(反复使用一种物质可以导致上瘾),显然A为正确答案。B选项的情况有一定干扰性,但与原文意思有所不同。而C、D都不是题干中“Physical dependence on certain substances”的原因。
[题目译文]
对于某些物质的心理依赖是由于 。
[A] 长时间对于这些物质的无节制使用
[B] 专为社交目的使用这些物质
[C] 将这些物质大量应用于疾病治疗
[D] 随意用它们来消除难受的症状
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