某物质在氧气中燃烧,生成二氧化碳和水的质量比是22比9,则该物质化学式可能是A.CO B CH3OH C C2H2 D C2H4Since computers arrived,my job ( )much easier.A became B has becomeFor further details about our new products,(
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![某物质在氧气中燃烧,生成二氧化碳和水的质量比是22比9,则该物质化学式可能是A.CO B CH3OH C C2H2 D C2H4Since computers arrived,my job ( )much easier.A became B has becomeFor further details about our new products,(](/uploads/image/z/15136108-52-8.jpg?t=%E6%9F%90%E7%89%A9%E8%B4%A8%E5%9C%A8%E6%B0%A7%E6%B0%94%E4%B8%AD%E7%87%83%E7%83%A7%2C%E7%94%9F%E6%88%90%E4%BA%8C%E6%B0%A7%E5%8C%96%E7%A2%B3%E5%92%8C%E6%B0%B4%E7%9A%84%E8%B4%A8%E9%87%8F%E6%AF%94%E6%98%AF22%E6%AF%949%2C%E5%88%99%E8%AF%A5%E7%89%A9%E8%B4%A8%E5%8C%96%E5%AD%A6%E5%BC%8F%E5%8F%AF%E8%83%BD%E6%98%AFA.CO+B+CH3OH+C+C2H2+D+C2H4Since+computers+arrived%2Cmy+job+%EF%BC%88++%EF%BC%89much+easier.A+became+B+has+becomeFor+further+details+about+our+new++products%2C%EF%BC%88)
某物质在氧气中燃烧,生成二氧化碳和水的质量比是22比9,则该物质化学式可能是A.CO B CH3OH C C2H2 D C2H4Since computers arrived,my job ( )much easier.A became B has becomeFor further details about our new products,(
某物质在氧气中燃烧,生成二氧化碳和水的质量比是22比9,则该物质化学式可能是
A.CO B CH3OH C C2H2 D C2H4
Since computers arrived,my job ( )much easier.
A became B has become
For further details about our new products,( )our company's website.
A visiting B to visit
How would you like your coffee?
A Black,please.B Very much C It tastes good D No thanks
某物质在氧气中燃烧,生成二氧化碳和水的质量比是22比9,则该物质化学式可能是A.CO B CH3OH C C2H2 D C2H4Since computers arrived,my job ( )much easier.A became B has becomeFor further details about our new products,(
化学题:选D:将比例换算成物质的量比:为CO2:H2O为0.5:0.5,则该物质的分子中,C:H=1:2,D项符合题意
英语1:选B,since引导的时间状语从句中,往往用完成时
2:无选项,你的题错了,前半句和后半句都不完整
3:A.注意how,“你要什么样的咖啡”“纯的,不要牛奶”
二氧化碳和水的质量比是22比9,即某物质的C和H比例为1:2,所以选D 过去完成时选B 固定形式选A 固定回答选C