右心房腔内开口的数目为()。
A.2个
B.3个
C.4个
D.5个
E.6个
参考答案:C
解析:右心房腔内有4个开口,分别为上、下腔静脉口,右房室口及冠状窦口。
After studying in a medical college for five years, Jane _____ her job as a doctor in the countryside. [ ]
A. set out
B. took over
C. took up
D. set up
()是急性肾功能衰竭少尿期最主要的死亡原因
A.高血钠
B.高血钾
C.低血钠
D.低血钾
E.高血钙