It shows that a knowledge of first aid can .
A. make a difference
B. fall ill
C. squeeze out
D. put its hands on
网友回答
(答案→)A. make a difference
B. fall ill
C. squeeze out
D. put its hands on
解析：考查短语辨析。make a difference 有意义，有所不同，fall ill 生病，squeeze out挤出，put its hands on着手工作，句意：表明急救知识会有意义。所以选A。