下颌骨易发生骨折的薄弱部位不包括
A．正中联合
B．颏孔区
C．下颌角
D．乙状切迹
E．髁状突颈部
参考答案：D
—I have a bad headache.
—______.[ ]
A. You are ill.
B. Nothing.
C. You should see a doctor.
D. What's the matter?
心源性哮喘可选用
A．肾上腺素B．去甲肾上腺素C．异丙肾上腺素D．吗啡E．多巴胺
