A、C<sub>nsub>H<sub>2n+2sub>O<sub>2sub> B、C<sub>nsub>H<sub>2nsub>O<sub>2sub> C、C<sub>nsub>H<sub>n+2sub>O<sub>2sub> D、C<sub>nsub>H<sub>2n+1sub>O<sub>2sub>
A、C<sub>nsub>H<sub>2n+2sub>O<sub>2sub> B、C<sub>nsub>H<sub>2nsub>O<sub>2sub> C、C<sub>nsub>H<sub>n+2sub>O<sub>2sub> D、C<sub>nsub>H<sub>2n+1sub>O<sub>2sub>
A、N<sub>2sub>和CO<sub>2sub> B、N<sub>2sub>和H<sub>2sub>O C、CO<sub>2sub>和H<sub>2sub>O D、CO和H<sub>2sub>O
A、CO<sub>2sub> B、H<sub>2sub>O C、N<sub>2sub> D、NO<sub>2sub> E、H<sub>2sub> F、O<sub>2sub>
A、O<sub>2sub>+H<sub>2sub> B、O<sub>2sub>+Cl<sub>2sub> C、CO+H<sub>2sub> D、N<sub>2sub>+O<sub>2sub>
A、CO、H<sub>2sub>、CH<sub>4sub>、N<sub>2sub> B、Ar<sub>2sub>、CH<sub>4sub>、N<sub>2sub>、H<sub>2sub>、NH<sub>3sub> C、NH<sub>3sub>、CH<sub>4sub>、N<sub>2sub>、CO<sub>2sub> D、H<sub>2sub>O、N<sub>2sub>、H<sub>2sub>、CH<sub>4sub>
A、C<sub>2sub>H<sub>2sub>、O<sub>2sub> B、CO<sub>2sub>、CO、H<sub>2sub> C、H<sub>2sub>O、N<sub>2sub>
A、H<sub>2sub>S和OH- B、H<sub>2sub>S和HS- C、H<sub>2sub>O和HS- D、H<sub>2sub>S和H<sub>2sub>O
A、H<sub>2sub>O B、O<sub>2sub> C、H<sub>2sub> D、N<sub>2sub>
A、N<sub>2sub>O和NO<sub>2sub> B、N<sub>2sub>O和NO C、NO和NO<sub>2sub> D、NO<sub>2sub>和N<sub>2sub>O<sub>3sub>
A、c(FeSO<sub>4sub>)=c(H<sub>2sub>C<sub>2sub>O<sub>4sub>) B、3c(FeSO<sub>4sub>)=c(H<sub>2sub>C<sub>2sub>O<sub>4sub>) C、2c(FeSO<sub>4sub>)=c(H<sub>2sub>C<sub>2sub>O<sub>4sub>) D、c(FeSO<sub>4sub>)=2c(H<sub>2sub>C<sub>2sub>O<sub>4sub>)