Your muscles are working to move a weight when you are ______. What makes your muscles hurt?

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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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Your muscles are working to move a weight when you are ______. What makes your muscles hurt?

大学英语四级

InMarch2012,atajewelryshowinSwitzerland,watchmakerHublotunveiledwhatnewsreportshailedastheworld’smostexpensi

PovertyexistsbecauseAmericansocietyisanunequalone,andthereareoverwhelmingpoliticalpressurestokeepitthatway.A

PovertyexistsbecauseAmericansocietyisanunequalone,andthereareoverwhelmingpoliticalpressurestokeepitthatway.A

PovertyexistsbecauseAmericansocietyisanunequalone,andthereareoverwhelmingpoliticalpressurestokeepitthatway.A

RajanNarayananisn’tyouraverageyogainstructor.Duringhisclasses,heuseswordsthatyouarefamiliarwith,【C1】________San

Atwork,asinlife,attractivewomengetalotofthebreaks.Studieshaveshownthattheyaremorelikelytobepromotedthan

A、Asickfriend.B、Amathclass.C、Schoolpolicy.D、Theman’stest.CWhatdothespeakersmainlydiscuss?

Ellenwaspleasedtohearpeoplepraisehergreattanskin.Theceilsinthelowerlayeroftheskinarereproducibleoncethe

A、Becausecity-dwellersareobligedtoadoptawhollyunnaturalwayoflife.B、Becausethesunwashiddenfromviewbytallbuil

What’sthemainideaofthefirstparagraph?What’stheadvantageofpositivedaydreams?

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在我国，保证金的缴存比例为( )。

申请证券上市交易，应当向()提出申请，由其依法审核同意，并由双方签订上市协议。

结婚的必备条件是()

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在我国，保证金的缴存比例为(　　)。