2019～2022英语周报八年级。答案

C本文是一篇说明文。研究者们发明了二种app,目的是解决道路的安全问题28.B推理判断题。根据第一段第一句“Adgmap which shows you the safest way to ghome, rather than just the quickestbeen developed by Cardiff Universityprevent the rise in pedestrian deaths.知,理想的电子地图应该为人们提供最安全到达目的地的路线。故选B。29.C细节理解题。根据第三段最后一句“Thaim of the study was to invent a fancy waof dealing with the rising number of pedestrian casualties that are occurring on ouoads each year."”可知,研究者发明这种新app的目的是通过用一种新方法来解决道路安全问题。故选C。0.B推理判断题。根据第四段第四句“ Of thos15 cities. Liverpool was ranked as havingthe most unsafe roads whereas Bath wasseen to have the safest.”可推知,利物浦的行人死亡数量是最多的。故选B。31.C观点态度题。根据最后一段最后一句“Thresearchers believe the maps could also buseful to city planners and developers wheassessing how changes to infrastructurmay affect road safety, such as the pedtrianizing of roads or the changing of可知,作者认为新研发的app在保道路安全方面很有效。故选C

7.B【解析】A.在单位圆x2 y2=1上或圆外任取点P(a,b),满足“a2 b2≥1”,根据三角形两边之和大于第三边,一定有“a| |b≥1”,在单位圆内任取点M(a,b),满足“|a| 1b≥1”,但不满足,“a2 b21”,故a2 b2≥1是“a| b≥1”的充分不必要条件,故命题A正确;B.“p且q为真”,则命题p、q均为真,所以“p或q为真”.反之“p或q为真”,则力、q都为真或p、q一真一假,所以不一定有“p且q为真”所以命题“p且q为真”是“p或q为真”的充分不必要条件,故命题B不正确;C.若x2>y2>0,有x>y>0成立,其否命题与逆命题真假性相同,逆侖题为真,否命题为真,故命题C正确;D.若x lnx>1,则x-1 1nx>0,设f(x)=x-1 lnx,其中x>0,f(x)=1 >0恒成立,f(x)在十∞)上单调递增,且f(1)=0,∴f(x)>0时x即x lnx>1时x>1,故命题D正确.故选B.

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