大量失血时最早期的反应是外周阻力降低。()
参考答案：错
To the great ________ of the citizens, no one else was infected with H1N1 except the 12
confirmed cases. [ ]
A. relaxation
B. disappointment
C. relief
D. surprise
诊断颅底骨折的主要依据是( )。
A．头部外伤史B．软组织淤血斑C．脑脊液外漏D．脑神经损伤E．颅内高压征
