东汉时期，我国居世界领先地位的科技成就是
①造纸术②地动仪③麻沸散④水排⑤指南针[ ]
A．①②③④
B．①②③④⑤
C．①②③⑤
D．①②④⑤
答案：A
—I drove to Zhuhai for the air show last week.
—Is that ________ you had a few days off ?
A．where
B．when
C．what
D．why
男性，25岁，火焰烧伤总面积约2%。神志淡漠，四肢软弱，皮肤苍白。脉搏59次/分，血压12/8kPa(90/60mmHg)，尿量少于20ml/h。心电图上QRS增宽、PR间期延长、T波高而尖
A．COB．醛C．氰化物D．CO 2E．芥子气
