The cobra is dangerous. 眼镜蛇是危险的。
上面一句中的 the cobra 是表类属，请问它可以带修饰语吗？譬如：
The cobra in Africa is more dangerous.
The cobra of Africa is more dangerous.
The cobra from Africa is more dangerous.
这类说法也吗？若对，这里的 the cobra in / of / from Africa 仍是表类属吗？
你所说的类属，实质是定冠词的“类指”，即the +单数名词指这些的事物。
这和作者想表达的意思有关，和修饰语没关系。要依据语境判断。
以你的第一个句子为例：The cobra in Africa is more dangerous. 非洲的眼镜蛇更危险。假如作者指非洲的眼镜蛇这些，就是类指。可能的语境是：其它区域的眼镜蛇可能不危险。当然大家这里不去考虑现实怎么样，只不过从语言的使用方法上剖析。假如作者表达的意思是非洲的这只眼镜蛇，这就不是类指，是特指了。
依据你的例句，我给你几个外刊例句作参考和领会：
1. In comparisonwith the lion of Africa and the tiger ofAsia, though these may exhibit more activity and bloodthirstiness, the grizzly is not second in courageand excels them in power.
2. Poisonous snakesin other parts of the world include sea snakes, the fer-delance, the bushmaster, and the tropical rattlesnake in tropicalCentral America; the Malayan pit viper in the tropical Far East; the cobra inAfrica and Asia.
3.The largest skinsare those of the bear from Europe, Asia,and America, of the lion from Africa, and of the tiger from India.
