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11.D【解析】碳酸氢钠属于强电解质：Na HCO3一Na++HCO,A项错误；NO2通入水中制硝酸：3NO2+H2O-2H++2NO+NO,B项错误；向H2O2溶液中滴加FeCl3溶液，FeCl3起催化作用，C项错误；用Na2O2吸收CO2产生O2:2Na2O2+2CO2-2Na2CO3+O2,D项正确。

In the middle of the night Ramona awoke to a noise.Tense,she listened hard.There it was again,a sort ofthumping noise.Silence.Then again in the kitchen,something was moving.All the ghost stories she had everheard flew through her mind.Ramona sat up in bed,screaming,"Daddy!"Within seconds,Mr.Quimby rushedin,asking what was the matter.Pointing to the kitchen,Ramona sobbed something was moving there.Mr.Quimby smiled,assured her calmly and they went to have a look.On the table their jack-o'-lantern no longer had a whole face.Part of its forehead and one eye were gone.Picky-picky was crouched in guilt under the kitchen table."Bad cat!Bad cat!"screamed Ramona,angrilystamping her bare foot on the floor.The old cat flew out of the kitchen.Mr.Quimby laughed a small laugh,"Maybe he's starving."He put his arms around Ramona,who now burst into tears."Don't worry.We'll getanother pumpkin and make another cool jack-o'-lantern."