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小题1:What color is your cat ?       A.She is tall and she is in a red cap .

小题2:Are these erasers yours ?      B.It`s Mike`s .

小题3:What does Maria look like ?   C.It`s white .

小题4:Whose boxes are they ?       D.No, they are theirs .

小题5:Whose jacket is that ?         E.They`re Jim`s .

引起肺性脑病最主要的原因是（）

A.缺氧

B.高碳酸血症

C.电解质紊乱

D.肺毛细血管痉挛、狭窄、闭塞

E.肺泡弹性减弱