慢性肾衰竭继发性甲状旁腺功能亢进
A.降钾树脂B.碳酸氢钠C.促红素D.呋塞米(速尿)E.活性维生素D3
参考答案:E
.
Every possible means _________.However, nothing can ______him dying of cancer.
A.has tried; stop
B.have tried; keep
C.has been tried; prevent
D.have been tried; prevent
图15-1所示电路中ab间的等效电阻与电阻RL相等,则RL为下列何值()。
A.10Ω
B.15Ω
C.20Ω
D.