She wrote ______ second book, which turned out to be still popular with ______ young.

A．the; the

B．a; 不填

C．a; the

D．the; 不填

通过鼓室小管下口的结构是（）。

A.舌咽神经的鼓室支即鼓室神经

B.迷走神经耳支

C.耳蜗导水管

D.前庭导水管

E.内淋巴管