题目

以下不能作燃料的气体是［ ］A. 氢气 B. 空气 C. 一氧化碳 D. 甲烷 答案：【答案】B【解析】A、氢气有可燃性，可以作气体燃料，正确；B、空气没有可燃性，不能作气体燃料，错误；C、一氧化碳有可燃性，可以作气体燃料，正确；D、甲烷具有可燃性，可以作气体燃料，正确。故选C。16．Why isn't the boy going to watch the talk show with the girl？A．Because he doesn't like the show．B．Because he has a lot of homework to do．C．Because the show is boring．