艾滋病英语作文：艾滋病未解之谜_2000字
关于艾滋病的作文

        In the 20years since the first cases of AIDS were detected, scientists say they have learned more about this viral disease than any other. 　　Yet Peter Piot, who directs the United Nations AIDS program, and Stefano Vella of Rome, president of the International AIDS Society, and other experts say reviewing unanswered questions could prove useful as a measure of progress for AIDS and othe    （共 3127 字）     [阅读本文] >>