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Your muscles are working to move a weight when you are ______. What makes your muscles hurt?
Your muscles are working to move a weight when you are ______. What makes your muscles hurt?
admin
2009-09-12
46
问题
Your muscles are working to move a weight when you are ______.
What makes your muscles hurt?
选项
A、Glucose.
B、Oxygen-rich blood.
C、ATP.
D、Lactic acid.
答案
D
解析
根据题干信息词make your muscles hurt定位到第四个小标题下的最后一段第二句The acid is what makes your muscles hurt,可知无氧呼吸有一个明确的限制,这是因为无氧呼吸在产生ATP的同时,也伴随着产生乳酸,而乳酸(lactic acid)恰巧是让肌肉感到疼痛的物质,故本题选D。
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大学英语四级
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