And you? B. Nice to meet you, too. C. Very nice.
A. 正确 B. 错误
A. P↑:CH4↓、CO↑、CO2↑、H2↑ B. P↑:CH4↓、CO↑、CO2↓、H2↑ C. P↑:CH4↓、CO↑、CO2↑、H2↓ D. P↓:CH4↓、CO↑、CO2↑、H2&uarr