题目内容:
Which statement is not true according to the passage?
A.U.S.health officials are increasing surveillance measures at doctors’offices. B.So far,the cases of swine flu in the United States are not very serious.
C.U.S.officials are determined to take more aggressive actions against swine flu.
D.Besser says the number of infections will probably rise.
参考答案:
答案解析: