91、According the passage, which of the following is true?
A. People are now faced with the most terrible disease the world ever had.
B. Bird flu cases have been found in pigs.
C.Bird flu found in Vietnam and Korea is of the most dangerous kind.
D.Bird flu cases in humans have been found in only two countries.
出自:伊犁师范大学-大学英语二

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块