A. 物理干扰 B. 化学干扰 C. 电离干扰 D. 磁场干扰
A. would not die B. could not have died C. might not die D. should not have died
A. 村级 B. 乡(镇)级 C. 县(市)级 D. 省(自治区、直辖市)