This August will be very precious for graduates by which time they _________into a university.

A．will be admitted

B．will have admitted

C．have been admitted

D．will have been admitted

氧化锆传感器中的感受元件的材料利用它能传递（）的性质。

A.锆离子

B.氧离子

C.氧化锆分子

D.氧离子空穴