题目内容:
AccordingtoFederalhealthofficials,thefactthatmoreWestNilecaseshavebeenreportedindicatesthat
A.morestatesareaffected. B.theaverageagedroppeddrastically.
C.healthofficialsaremorealerttothedisease.
D.theepidemicseasonbeganamonthearlier.
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: