滤过血液形成原尿的结构（）。
A.肾小体
B.近端小管
C.远端小管
D.集合小管
参考答案：A
It was lack of money, not of effort, _____ defeated their plan.
A．which
B．as
C．that
D．what
万用表面板上的插孔和接线柱都有（）标记。
