我国下列哪些疾病被列为计划免疫（）
A.细菌性痢疾
B.霍乱
C.百日咳
D.白喉
E.流脑
参考答案：C, D, E
跨区域灭火救援行动中参加抢险救灾的社会力量由（）政府协调解决。
A、县
B、省（市）
C、当地
D、参战力量
Experiments of this kind ________ in both the U. S. and Europe well before the Second World War.[ ]
A. have conducted
B. have been conducted
C. had conducted
D. had been conducted
