【二轮专题练】(一)阅读理解专项AWheredidnovelcoronaviruscomefrom
ASCOVID-19spreadsthroughoutChinaandtherestoftheworld,animportantquestionhasyettobeanswered:wheredidtheviruscomefrom
Thelateststudyindicatedthatpangolins(穿山甲)maybeanintermediatehostofthevirus,accordingtoXinhua
However,batsaresuspectedtobetheoriginalcause
Wedon’tknowthesourceyet,butthere’sprettystrongevidencethatthisisabatorigincoronavirus,”saidPeterDazsak,presidentofEcoHealthAlliance,anenvironmentalnonprofit,accordingtoTheNewYorkTimes
“Whenyoulookatthegeneticsequence(基因序列)ofthevirus,andyoumatchitupwitheveryknowncoronavirus,theclosestrelativesarefrombats,”DazsakalsotoldCNN
Sowhyarebatsthesourceofsomanydeadlykindsofvirusesbuttheydon’tsufferfromanysymptoms
Astheonlyflyingmammal(哺乳动物)withlonglifespan,bats’bodytemperatureishigh,similartoafever