2. 外语
  3. In general, men tend to walk faster than women. That’s because walking speed is【B1】_____by physical features and using them in a

In general, men tend to walk faster than women. That’s because walking speed is【B1】_____by physical features and using them in a

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问题     In general, men tend to walk faster than women. That’s because walking speed is【B1】_____by physical features and using them in a way that minimizes energy expenditure. Mass and lower limb【B2】_____ influence walking speed, and in general, men tend to be higher in both.
    What scientists say is unclear is what happens when a man and a woman walk together. If someone has to change their speed to align with the other, who will do it? It【B3】_____—it’s consistently the men.
    To study this, the researchers from Seattle Pacific University in Washington studied the walking speed choices of eleven men and eleven women as they walked around a【B4】_____alone, with friends of the same and opposite sex, and with a significant other holding hands or hands-free.
    In their study, they found that when walking with women, men significantly slow their pace to their companions’, but only if the woman is their【B5】_____partner. Walking with friends did not significantly change pace for anyone, and women only slightly changed their pace when walking with their partner. The authors say this suggests that【B6】_____stride only happens for romantic partners.
    Biologically speaking, the researchers say it【B7】_____that men are more likely to take on an energetic burden to accommodate their lover. That’s because a woman’s reproductive system【B8】_____ energy disturbances, and in hunter-gather societies that sometimes walked long distances, too much energy expenditure could【B9】_____a woman’s ability to conceive. The researchers believe this provides an added layer of information for【B10】_____fossil footprints of ancient societies.
【B2】
选项
答案length
解析 根据空格所在位置可知，空格处应填入名词作句子的主语。结合录音可填入length，意为“长度”。limb length意为“肢体长度”。
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