The traffic slowed down because of the heavy snow in Yushu County, presenting a new ____ to the reco

题干

The traffic slowed down because of the heavy snow in Yushu County, presenting a new ____ to the recovery from the earthquake．

A：suffering

B：disaster

C：damage

D：challenge

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\underline{\underline{\overset{}{\leftarrow}}}

化学键	H—H	O—H	C—H	C $\underline{\underline{\overset{}{\leftarrow}}}$ O
E/(KJ·mol^-1)	436	465	413	1076

则反应 CO(g)+3H₂(g) $\overset{}{⇌}$ CH₄(g)+H₂O(g)的△H的值为（）