山西省2023~2024学年度八年级上学期期末综合评估 4L R-SHX数学试卷答案,我们目前收集并整理关于山西省2023~2024学年度八年级上学期期末综合评估 4L R-SHX数学得系列试题及其答案，更多试题答案请关注我们

山西省2023~2024学年度八年级上学期期末综合评估 4L R-SHX数学试卷答案

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选项中有两项为多余答案选项

六、语法填空（共10小题；每小题1分，满分10分）》Howtomakefriendsatanewschool阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式

Startingatanewschoolcanbedifficult.Everythingseemstobedifficult,andyoudon'tevenWithmyhighschoollife1(begin),Ifeelalittleanxiousrightnow.Ihopetomakeagoodknowwheretogoforyourownclasses.1However,ifyouusetheseskills,youcanquicklyturnfirst2(impress).ButIwonderwhetherIwillmakefriendsorwhatifnoonetalkstome.someofthosestrangersintofriends.Totellthetruth,themathsclasswasdifficultforme,3theteacherwaskindandfriendly.Beyourself.Hetoldusafunnystoryandeverystudentlaughedsomuch!Intheafternoon,wehadourchemistry席2Ifsomepeopledon'tacceptyou,they'renotthekindoffriendsyouneed.Peopleoftenclass.Thelabisnewandthelessonwas4(interest),buttheguynexttometriedtotalktomestaytogetherbecausetheyhavesimilarinterests.Forexample,someonewhodoesalotofsportsmaythewholetime.Therefore,Icouldn'tconcentrate5theexperiment.I6(real)wantedtomakefriendswiththosewhoalsorunorswimalot.tellhimtobequietandleavemealone!3Allinall,thefirstdayis7wonderfulday.ThoughIwasworriedinthemorning,Ididn't细Remembertobenicetothepeopleyoumeetatyournewschool.Ifyouthinkthatyouwillsayfeelawkwardor8(frighten)atall.IbelieveIwillmakenew9(friend)inthenewschoolsomethingthatmaymakethemfeelsad,donotsayanythingandjustnodyourheadiftheytalktohereandthere'salot10(explore)atseniorhigh.Ithinkthattomorrowwillbeagreatday!you.Also,remembertobeashelpfulaspossible!英语（人教版）第3页（共4页）衡水金卷·先享题·高一同步周测卷一英语（人教版）第4页（共4页）新教材

分析（1）可先设出变量：设产量为x，总成本为y，根据条件即可建立x，y的函数关系式；
（2）方法同上，设产量为x，销售收入为y，然后根据条件便可建立关于x，y的函数关系式；
（3）方法同上，可建立出函数关系式为y=120x-12000，而要保本需y≥0，从而解120x-12000≥0便可得出x的最小值，即得出能保本的最少产量．

解答解：（1）设产品的产量为x件，总成本为y元，则总成本与产量间的函数关系为：
y=60x+12000；
（2）设产量为x件，销售收入为y元，则：
y=180x；
（3）设产量为x，利润收入为y，则：
y=180x-60x-12000=120x-12000；
即y=120x-12000；
解120x-12000≥0得，x≥100；
∴产量至少为100件时才会保本．

点评考查函数的概念及表示，根据实际问题建立函数关系式的方法，清楚本题出现的几个概念，比如固定成本，可变成本，总成本，销售收入，利润收入等．