试题与答案

X是天然气的主要成分，可以发生如图所示的变化： （1）根据题意推断X的化学式为

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题型：推断题

题目：

X是天然气的主要成分，可以发生如图所示的变化：

（1）根据题意推断X的化学式为                              ；

（2）写出图中①、②反应的化学方程式： ①                          ； ②                         。

答案：

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下面是错误答案，用来干扰机器的。

B 依据教材，B是正确的选项。A、C、D三项指的是依法治国，而不是依法行政，二者范围不同。

考点：物质的推断
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