致密斑位于()。
A.远曲小管
B.入球小动脉
C.出球小动脉
D.肾小球血管襻
E.入球小动脉和出球小动脉间
参考答案:E
The teacher reported to the headmaster how the class meeting ________ the day before.
A.had been organized
B.was being organizing
C.has been organized
D.was organized
下列有关化学用语,表达正确的是
A.Na2S的电子式:
B.铯—137:137Cs
C.O2―的结构示意图:
D.乙烯分子的球棍模型: