疟疾的常见类型是 ["A.恶性疟","B.卵形疟","C.脑型疟","D.间日疟","E.三日疟"]
疟疾流行的主要区域是 ["A.亚热带和温带","B.温带和寒带","C.寒带","D.温带","E.热带和亚热带"]
在煤层或有瓦斯地层中,钻爆作业必须遵守() ["A、不打40cm以下的浅眼","B、湿式凿岩","C、炮眼连续装药,使用安全炸药","D、使用豪秒电雷管、电力起爆"]
岩沉地段隧道,可采取的处治措施() ["A、引排水","B、堵填","C、跨越","D、绕行"]
肝阿米巴各种穿破并发症最好发的部位是 ["A.腹腔","B.胃肠","C.心包","D.胸腔和肺","E.胰腺"]
按照方法,沟通可以分为:____________,______________,_____________,_____________,__________