填空题Some scientists believe that yawning is just to make us more alert.____
填空题
Some scientists believe that yawning is just to make us more alert.____
参考解析
解析：
根据题干信息“some scientists”可以定位到I段“Some scientists believe that yawning is an involuntary response to a stressful situation: When we yawn, we increase the blood flow to the brain, thus making us more alert.”，一些科学家认为打哈欠是我们在紧张状态下的一种不自觉的反应。当我们打哈欠时，血液流向大脑，使我们更警惕。故匹配段落为I。
根据题干信息“some scientists”可以定位到I段“Some scientists believe that yawning is an involuntary response to a stressful situation: When we yawn, we increase the blood flow to the brain, thus making us more alert.”，一些科学家认为打哈欠是我们在紧张状态下的一种不自觉的反应。当我们打哈欠时，血液流向大脑，使我们更警惕。故匹配段落为I。
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填空题Some scientists believe that yawning is just to make us more alert.____