在野外遇到轻微擦伤时,可用下列哪一种药物()
A.牛黄解毒片
B.阿司匹林
C.黄连素
D.碘酒
参考答案:D
下列物质中,属于单质的是( )
A.二氧化碳
B.氧气
C.空气
D.烧碱
Jane was hit on the head by the robber and was knocked ________.
A.mindless
B.unaware
C.brainless
D.unconscious