mountain可数吗?

Two men were frozen to death on the mountain.

两个男子在山上冻死了。

What's the highest mountain in the US?

美国哪座山最高？

Three people died during an assault on the mountain.

登山过程中有三人死亡。

They had to blast a tunnel through the mountain.

他们得炸出一条穿山隧道。

It was a long slog to the top of the mountain.

到山顶的路漫长而艰难。