In Colombia, hippos don't have either of those problems. That's why their numbers are growing so much more quickly than they normally do in Africa.So what's the problem? Mainly, hippos poop(排便). During the day, hippos eat grass on land.At night, they remain in the water, pooping....
D. In Colombia, hippos don't have either of those problems. E. When he died in 1993, the hippos escaped and lived in the countryside. F. They are pushing out other kinds of animals that do belong to Colombia.-10 vears. Colombi a could have thousands of such hippos. 相关知识点: ...
2.C 。第的Scientists warn the hippos do not have a natural predator in Colombia. 可知,河马在哥伦比亚没有天敌,这是其数量 大增的原因。 3.A 细节 解。 由第五段的The animals also could be a problem for biodiversity as the waste they produce could do harm to native animals in the river....