A . PaO为50mmHg,PaCO为40mmHg
B . PaO为55mmHg,PaCO为50mmHg
C . PaO为65mmHg,PaCO为40mmHg
D . PaO为70mmHg,PaCO为40mmHg
E . PaO为70mmHg,PaCO为45mmHg