诊断颅骨骨折最可靠的依据是（） A.头部外伤史 B.临床表现 C._爱下问搜题

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问题单项选择题

诊断颅骨骨折最可靠的依据是（）

A.头部外伤史

B.临床表现

C.头颅X线片

D.头颅超声波检查

E.脑电图检查

答案

参考答案：C

选择题

Andy was crying in his room just now，but he wouldn’t tell me_______ made him so sad.

A．why it was that

B．why was it that

C．what it was that

D．what was it that

单项选择题

特定的工业区环境空气执行国家环境空气质量标准（GB3095—1996）（）标准。

A.一级

B.二级

C.三级

D.五级