百师联盟 2023届高三冲刺卷(五)5 河北卷地理试题答案

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【语篇导读】本文是一篇说明文。文章主要讲述了美国马里兰州的一个男孩和他的妹妹参加了一个由非盈利性的Rube Goldberg组织举办的比赛，制造了这样一台机器，它能够把一块肥皂丢到某人手上，解决了孩子们洗手难的问题。l.A【解析】推理判断题。根据第三段Every year,theRube Goldberg competition assigns a specific task,considering inventions that use complex systems to carryout a simple everyday task.可推知“sweeping the floor”属于简单的日常任务。故选A。2.B【解析】细节理解题。根据第四段But withschools closed to slow the spread of the virus,organizerschanged the rules.This year,the team can include anyfamily members and people were asked to send inrecordings of the machines to compete.和第五段Withtheir video demonstration,they can now enter thecompetition.可知，参赛视频有资格参赛。故选B。3.A【解析】推理判断题。根据最后一段She said that"creativity and play"connects with children.It is betterthan the message."We have to wash our hands becauseof this horrible virus,”Glowinski added.可知，Dr.AnneGlowinski认为这个发明很实用。故选A。4.D【解析】推理判断题。根据第一段But what ifwashing hands is connected to a fun creative activity?What if instead of simply reaching for the soap,amachine could drop it right into your hands?可知，作者的写作意图是介绍一项“让孩子洗手有乐趣”的比赛。故选D。

12.A【解析】因为f(x)=,所以(x)=2L-亡=2，x>0.e当x∈(0,2)时，f(x)>0,函数f(x)在(0,2)上单调递增；当x∈(2，十∞)时，f'(x)<0,函数f(x)在(2，十∞)上单调递减.设g(a)=a-7a2-2a+e1a∈[0,1，则g(a)=3a2-a-2=(3a+2)(a-1),所以当a∈[0,1]时，p(a)≤0，函数p(a)在[0,1]上单调递减.所以p(a)max=p(0)=e1.因为f1)=e1,所以存在实数a∈[0,1]，使得不等式f(2-）≤a-a2-2a十e1成立，等价于f(2-)≤e1=fI).因为m为正实数，所以2-<2.m0<2-1≤又因为函数f(x)在(0,2)上单调递增，所以了m1,解得2