上述哪种损伤出现抽屉试验阳性
A．肩关节脱位B．桡骨小头半脱位C．髋关节中心性脱位D．交叉韧带断裂E．半月板损伤
参考答案：D
I asked her whether she had done all the work herself ________ whether she had had asked sb. for help.
A．and
B．but
C．nor
D．or
配制及输注液体和药物之前，需明确药物的（）。
A.化学性质
B.物理性质
C.药物相容性
D.药物稳定性
E.药物成分
