Himalayas is the highest mountain in the world .这样表示对吗关于下面两组语句表示方法的问题,在喜马拉雅 亚马逊这类山脉河流前,到底用不用the呢?网上怎么表示的都有,迷糊了.1aHimalayas is the highest mountain in the world .1bThe Himalayas is the highest mountain in the world2aAmazon is the longest River in the world.2bThe Amazon River is the longest River in the world.

Himalayas is the highest mountain in the world .这样表示对吗
关于下面两组语句表示方法的问题,在喜马拉雅 亚马逊这类山脉河流前,到底用不用the呢?网上怎么表示的都有,迷糊了.
1a
Himalayas is the highest mountain in the world .
1b
The Himalayas is the highest mountain in the world
2a
Amazon is the longest River in the world.
2b
The Amazon River is the longest River in the world.