According to Darwin, why do people laugh?A、Laugh is a survival technique for bab

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问题 According to Darwin, why do people laugh?

选项 A、Laugh is a survival technique for babies.
B、They laugh to ease hostilities.
C、They laugh to make parents feel relaxed.
D、They laugh to fight off disease.

答案 A

解析事实推理题。达尔文认为婴儿的微笑是进化过程中形成的对父母的“奖励”，父母陶醉于婴儿的微笑，这鼓励他们继续照顾婴儿。我们可以推测出微笑是婴儿的生存技巧。所以选择A。

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According to Darwin, why do people laugh?A、Laugh is a survival technique for bab

Accordingtothepassage,howcanyoungpeoplestayinahostel?A、Iftheyarrive

Today,howmanyyoungpeoplecantheroomsinallthehostelsintheworldhold?

Whyisthepriceofhostelslow?A、Peoplebringtheirownequipment.B、Aruinedc

Whyisthepresenteducationsystemcriticizedaccordingtothepassage?A、Becaus

Whatistheadvantageforthepeoplewhojointheco-opfora6-monthperiod?A、T

Wherecanpeoplefindthetallestredwoodtrees?[originaltext]M:Haveyouevervi

AccordingtoKerrnitsis,whatcausedthemostofthedevastation?A、Themassives

Accordingtodefenseofficials,thepurposeofthePentagoncreatingthespecial

WhatdoestheHongKonggovernmentcallonitspeopletodo?A、Toknowtheagenda

HowmanyofficersdoestheHongKongPolicedepartmentroughlyhaveaccordingto

Sometimeago,aninterestingdiscoverywasmadeby【C1】______ontheAegeani

AimlessnesshashardlybeentypicalofthepostwarJapanwhoseproductivity

蝶窦黏液囊肿侵犯眶内可引起A.眼球向外移位 B.眼球向外下方移位 C.眼球突

对于加工型企业，所属的风险敞口类型为（ ）。A.上游闭口、下游敞口型 B.上

底物浓度对酶促反应的影响错误的是A:底物浓度的变化对反应速度作图呈矩形双曲线

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