He was born ________ the morning of December 8th. [ ]
A. in
B. on
C. at
D. of
答案:B
如图所示的仪器,是用来测量物体 ______的工具,它实质是一个 ______杠杆.
烧伤病人烧伤面积80%,伤后48小时体温39.9℃,寒战外周血白细胞18乘以十的九次方/L,血培养阳性,创面分泌物培养阳性,可能是
A.COB.醛C.氰化物D.CO 2E.芥子气