题目内容:
CDCconsideredtheoutbreakofWestNilein1999asaconsequenceof__________
A.theabolitionofthemosquito-controlprograms B.thesurvivingmosquito-borneinfections
C.theabuseofsome$50millioninfunds
D.itsfailuretoconquermosquito-bornediseases
参考答案:
答案解析: