颅底骨折的间接征象是:
A.硬膜外血肿
B.硬膜内血肿
C.头皮血肿
D.副鼻窦和乳突气房出现气一液面
E.脑血肿
参考答案:D
楼梯平台深度不应小于()的宽度。
In software engineering and systems engineering, (71) 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.business ruleC.use case D.traceability matrix