北京冬天易出现的灾害性天气是[ ]
A.洪涝
B.沙尘暴
C.寒潮
D.台风
答案:C
It is no longer________it was 20 years ago, ________it was so poorly equipped. [ ]
A. what; when
B. that; which
C. what; which
D. which; that
患儿男,9岁。有机磷农药中毒,出现大量出汗,呼吸困难,口唇青紫,呼吸道分泌物增多,应立即静脉注射()
A.哌替啶
B.氨茶碱
C.呋塞米
D.氯解磷定
E.东莨菪碱