A:NaH在水中显碱性
B:NaH中氢离子电子层排布与氦原子相同
C:NaH中氢离子半径比锂离子半径大
D:NaH中氢离子被还原为H2
—Dr. Jackson is not in his office at the moment.
—All right. I____ him later.
— Did you listen to the program yesterday?
— Yes. I can't believe I heard her singing ______ the radio.
如图是人体肾单位结构示意图,请据图回答