"呃逆"病名是何人确定下来的（）
A.张景岳
B.巢元方
C.张仲景
D.陈无择
E.孙思邈
参考答案：A
骨折常有的并发症是（）
A.损伤性休克
B.骨折附近血管损伤
C.骨折附近神经损伤
D.闭合性骨折并发感染
E.脂肪栓塞症
In software engineering and systems engineering, （）is a description of a system's behavior as it responds to a request that originates from outside of that system.
A.black box
B.busines srule
C.traceability matrix
D.use case
