体表用冷时，冻伤的早期症状是()
A．皮肤呈青紫色
B．皮肤呈苍白色
C．麻木感
D．局部温度低
E．皮肤呈潮红色
参考答案：A, B, C, D
Few of the members are young like me, _________? [ ]
A. are they
B. aren't they
C. do they
D. don't they
本例右侧胸水产生的机制是
A．心源性肝硬化
B．营养不良，血浆蛋白降低
C．胸膜脏层和壁层静脉回流受阻
D．钠水潴留
