狮子和老虎一样危险in english

Lion is as dangerous as tiger.

上面的A lion is as dangerous as a tiger.
The lion is as dangerous as the tiger.
Lions are as dangerous as tigers.
或
A lion is the same dangerous as a tiger
The lion is the same dangerous as the tiger.
Lions is the same dangerous as tigers 都可以的

A lion is as dangerous as a tiger.
The lion is as dangerous as the tiger.
Lions are as dangerous as tigers.
前面一定要有冠词，否则应用复数

Lion is as dangerous as tiger.

Lion is the same dangerous as tiger.