2. 外语
  3. Most doctors agree that overeating is one of the main health problems, since it places a great ______ on the heart.

Most doctors agree that overeating is one of the main health problems, since it places a great ______ on the heart.

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问题 Most doctors agree that overeating is one of the main health problems, since it places a great ______ on the heart.
选项 A、strain
B、stress
C、strength
D、stroke
答案A
解析 place a great strain on是“对……来说负担过重”的意思。stress意为“压力”； strength意为“力量”；stroke意为“(心脏病)发作”，它们用在本题的语法结构中均不合适。
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