将0.2 mol两种气态烃组成的混合气体完全燃烧后得到6.72 L二氧化碳（标准状况下）和7.2 g水，下列说法正确的是
| A．一定有乙烯 | B．一定有甲烷 |
| C．一定没有甲烷 | D．可能有乙烷 |
相关试题
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| A．as a result of | B．on top of | C．in front of | D．in need of |
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| A．other | B．others | C．one | D．ones ks |
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| A．continued | B．immediate | C．careful | D．general |
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| A．as | B．if | C．though | D．unless |
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