肝浊音上界消失，代之以鼓音者，是下列哪一种疾病的征象（）。

A.肝囊肿

B.急性重型肝炎

C.胃肠胀气

D.急性胃肠穿孔

E.右侧气胸

Questions 23-26

A．By taking notes.

B．By remembering what was said.

C．By getting up to shut the door.

D．By asking questions.