2024四川省德阳市高2024届第一次诊断性考试化学试卷及答案

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3.C【解析】催产素含有肽键,与双缩脲试剂反应呈现紫色,A正确;由题干信息可知,字母缩写Cys、Pro分别代表半胱氨酸和脯氨酸,B正确;催产素的环状结构中一共含有5个肽键,C错误;组成催产素的化学元素一定有C、H、O、N、S,D正确。

M.Mandy,canyoutellmesomethingalouttherulesoftakingoutthetrashinourcommunity?

W:OK.OnMonday,Wednesday,andFriday,youcanleaveyourburnabletrashoutside.

M:Whatisburnabletrash?

W:Burnabletrashis,forexample,milkboxes,otherpaperthings,andfood.Youcanputalltheremainsofyourfoodintheburmablebin.

M.OK.Whatabouttheothertrash?

W:OnTuesday,Thursday,andSaturday,youcanleaveyourunbumabletrashoutsideyourdoor.

M.Thenwhatisunburnabletrash?

W,Suchasplastic.Ifyouburnsomeplasticproducts.itwoulddoharmtotheenvironment.

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