千百种动物是人类的益友,但有时它们也会为你带来巨大灾难,这是人类不能不时刻警惕的,下面是最近发生几起突出事件。关岛蛇灾关岛全岛面积２０９平方英里,岛上毒蛇数量之多,达到了惊人的地步。平均每平方英里不下１２０００条,多数蛇长达到二至十英尺。科学家在一份调查报告中 Thousands of animals are human beings and friends, but sometimes they can also bring great disaster to you. This is why human beings can not but always be on guard. Here are a few recent prominent events. Guam snake disaster Guam Island area of ​​209 square miles, the island as many as the number of snakes reached an alarming rate. An average of no fewer than 12,000 square miles per mile, most snakes up to two to ten feet. Scientists in a survey report