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the writing re(relatively recently.However,a new study finds that pandas'particular passion formy have riginedast6million yearsdue to the plant's widets us from ex-year round availability.our characteron low-nutrient bamboo,modern pandas have developed athe vast flowthat allows them to eildtheoen up to the"Tightly holding bamboo stems in order to crush them into bite sizes is perhaps the mostAnd I've seenrtdo to consumingare quntity of bmboo,d udyitings reflectWang,an officer at the Natural History Museum of Los Angeles County,in a statement.ninmetepnd reort owthe h congehon biyePrevh ad found evienceof this thumb-like structure fromabou0 yearsWang and his tem identified much earlier proof of pandas havinganex fingerandhuslbmboo dietin the form offossild digit dating back6t7million years.Thefossil,unearthed in Yunnan Province in southwest China,belonged to a panda ancestorknownas Ailurarctos.While the giant panda's sixth digit is not as elegant or skillful as humanthumbs,the persistence of this"characteristic morphology"over millions of years suggestedthat it plays an important function for survival,the study noted.28.What can we know about giant pandas'ancestors?A.They had a balanced diet.B.They looked like other bears.C.Their favorite food was meat.D.They ate more than bamboo.29.Why have modern pandas developed a sixth finger?A.To scare other animals away.B.To efficiently handle bamboo.C.To get different kinds of food.30.D.To leave low-nutrient bamboo out.What does the underlined word"baffled"in paragraph 3 mean?A.Excited.B.Upset.31.C.Puzzled.What is the text mainly about?D.Surprised.A.New proof to show pandas'earlier evolution.spend 15B.The function of the giant pandas'sixth finger.a muchC.The reason why pandas especially like bamboo.evolvedD.Differences between pandas and their ancestors.考-SX】·102·【24·G3DY·英语（九）-R-必考-SX】高的心灵。需，谁能说信斯无其是长品科技的应加天量种植和使用棉花的地区，昼夜湿差大