CO<sub>2</sub>焊不适合于焊接()。
A、A.低碳钢
B、B.中碳钢
C、C.低合金钢
D、D.不锈钢
A、A.低碳钢
B、B.中碳钢
C、C.低合金钢
D、D.不锈钢
A、CO、CO<sub>2sub>、O<sub>2sub> B、CO<sub>2sub>、O<sub>2sub>、CO C、O<sub>2sub>、CO、CO<sub>2sub> D、O<sub>2sub>、CO<sub>2sub>、CO
A、C+O<sub>2sub>=CO<sub>2sub> B、CO<sub>2sub>+C=2CO<sub>2sub> C、2CO<sub>2sub>+O<sub>2sub>=2CO<sub>2sub> D、2CO=CO<sub>2sub>+C
A、CO+2H<sub>2sub> = CH<sub>3sub>OH+Q;CO<sub>2sub>+3H<sub>2sub>= CH<sub>3sub>OH+H<sub>2sub>O+Q B、CO+H<sub>2sub>O = CO<sub>2sub>+H<sub>2sub>;4CO+8H<sub>2sub> = C<sub>4sub>H<sub>9sub>OH+3H<sub>2sub>O C、CO+3H<sub>2sub> = CH<sub>4sub>+H<sub>2sub>O+Q ;CO<sub>2sub>+4H<sub>2sub> = CH<sub>4sub>+2H<sub>2sub>O+Q D、CO+2H<sub>2sub> = CH<sub>4sub>+Q;CO<sub>2sub>+3H<sub>2sub> = CH<sub>4sub>+H<sub>2sub>O+Q
A、C+O<sub>2sub>→CO<sub>2sub>+Q,C+O<sub>2sub>→CO+Q B、CO<sub>2sub>+C→CO-Q,CO+H<sub>2sub>→CH<sub>4sub>+H<sub>2sub>O+Q. C、C+O<sub>2sub>→CO+Q,C+H<sub>2sub>O→CO+H<sub>2sub>-Q D、CO<sub>2sub>+C→CO-Q,C+H<sub>2sub>O→CO+H<sub>2sub>-Q
A、CO<sub>2sub>+H<sub>2sub>S→CS<sub>2sub>+2H<sub>2sub>O B、CO<sub>2sub>+2S→CS<sub>2sub>+O<sub>2sub> C、CO<sub>2sub>+2H<sub>2sub>S→CS<sub>2sub>+H<sub>2sub>O D、CO<sub>2sub>+2H<sub>2sub>S→CS<sub>2sub>+2H<sub>2sub>O
A、CO<sub>2sub>浓度不会影响细胞代谢 B、CO<sub>2sub>浓度发酵过程中不会发生变化 C、CO<sub>2sub>浓度会影响细胞生长 D、CO<sub>2sub>浓度不会影响细胞生长
A、C+O<sub>2sub>=CO<sub>2sub> B、C+O<sub>2sub>=CO C、CO+H<sub>2sub>O=CO<sub>2sub>+H<sub>2sub> D、C+H<sub>2sub>O=CO+H<sub>2sub>
A、T↑:CH<sub>4sub>↓、CO↑、CO<sub>2sub>↑、H<sub>2sub>↑ B、T↑:CH<sub>4sub>↓、CO↑、CO<sub>2sub>↓、H<sub>2sub>↑ C、T↑:CH<sub>4sub>↓、CO↑、CO<sub>2sub>↑、H<sub>2sub>↓ D、T↓:CH<sub>4sub>↓、CO↑、CO<sub>2sub>↑、H<sub>2sub>↑