肢端肥大症患者血压较高是因为()
A.交感神经兴奋
B.肾小管重吸收加强
C.钠潴留
D.肾素-血管紧张素-醛固酮系统活性降低
E.细胞外容量增加
参考答案:A, C, D, E
— I rang you at about nine, But there was no reply.
— Oh, that was probably ______ I was seeing the doctor. [ ]
A. why
B. when
C. what
D. that
液相色谱中通用型检测器是()
A、紫外吸收检测器
B、示差折光检测器
C、热导池检测器
D、氢焰检测器