—Have you seen         book on the desk?

—Is it         English book? I saw it just now.

A．the; /

B．/; the

C．the, an

D．a; /

下列关于腹膜肿瘤的描述，错误的是（）

A.常不发生腹腔积液

B.继发性多来自腹内脏器肿瘤种植扩散

C.可发生于腹膜的壁或脏层以及系膜

D.肿瘤常呈板块状或结节状

E.原发性以腹膜间皮瘤为多见