术前6～12个月内曾用肾上腺皮质激素1～2周以上，拟施大手术
A．低渗性脱水B．高渗性缺水C．等渗性缺水D．高血钾E．低血钾
参考答案：C
反刍动物早期妊娠识别的信号是（）
A.卵巢有黄体
B.子宫内有胎儿
C.血液中有促性腺激素
D.胚胎滋养层分泌滋养层蛋白
E.孕激素含量增加
-What happened to the ancient town?
- . [ ]
A.It destroyed in the flood
B.The flood was destroying it
C.The flood was destroyed it
D.It was destroyed in the flood
