[多项选择]不要打开来历不明的网页、电子邮件链接或附件是因为（）
A. 互联网上充斥着各种钓鱼网站、病毒、木马程序
B. 可能含有的病毒、木马会自动进入电脑并隐藏在电脑中，会造成文件丢失损坏
C. 可能含有的病毒、木马会自动进入电脑并隐藏在电脑中，会导致系统瘫痪
D. 不明来历的网页、电子邮件链接、附件中，很可能隐藏着大量的病毒、木马

Culture is the sum total of all the traditions, customs, belief and ways bf life of a given group of human beings. In this sense, every group has a culture, however savage, undeveloped, or uncivilized it may seem to us.
To the professional anthropologist, there is no intrinsic superiority of one culture over another, just as to the professional linguist there is no intrinsic hierarchy among languages.
People once thought of the languages of backward groups as savage, undeveloped form of speech, consisting largely of grunts and groans. While it is possible that language in general began as a series of grunts and groans, it is a fact established by the study of "backward" languages that no spoken tongue answers that description today. Most languages of uncivilized groups are, by our most severe standards, extremely complex, delicate, and ingenious pieces of machinery for the transfer of ideas. They fall behind the Western languages not in their sound patte
A. American Indian languages are not backward
B. "Backward" languages are borrowing from other languages
C. "backward" languages may possess quite complicated vocabularies
D. Western languages may also borrow from "backward" languages