More shark attacks happened in the United States last year than in any other country, according to the University of Florida's International shark attack File annual report, released today.

And in 2002 with the international pig-breeding technology, the most authoritative institutions of the United States — Purdue University became a technology partner.

Zhang Tao, a professor at Sichuan International Studies University, thought Americans lacked a basic understanding of China, when he first went to the United States as a visiting scholar.