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29.What might Amelia say first after the doors were opened?A.“I need to see the doctor..”B.“Thank you for8 aving us.”C.“I'm sorry to trouble you.”D.“Iwon't take the lift any more.”30.What can we learn from the text?A.Work together as one.B.Believe in yourself at any time.C.Stay cool in the face of danger.D.Look at things in a different way.CHave you ever seen pandas that aren't black-and-white?Scientists have foundthat there are brown-and-white pandas living in a mountain in China.Scientists studied the genes (of different pandas in the wild and theyhave found that pandas with brown-and-white coats are the result of changes in thenatural environment.To understand what lies behind the special color,the scientistsstudied Qizai,a brown panda in Hanzhong.He is now the only brown panda incaptivity(圈养).When compared with hair from three black-and-white pandas,Qizai's brownishcoat had fewer and smaller melanosomes ()What's more,the melanosomeswere more likely to be differently shaped,the study team found.The scientists thencollected genetic information about Qizai and pieced together his family tree.The scientists studied the genetic information from Qizai's family members andcompared it with the genetic information from 12 black-and-white pandas from theQinling Mountains and 17 black-and-white pandas from other places in China.While none of Qizai's family members had brown coats,the scientists were ableto show that his parents and son all had one copy of the recessive trait(隐性特质)on a certain gene,while Qizai had two copies.The scientists then studied another192 black-and-white pandas.The gene change causing the brown coats was onlyfound in two pandas from the Qinling Mountains in Shaanxi,not Sichuan province,where most China's pandas live.英语试题卷第6页（共12页）
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