—______ bargaining is always such great fun?

—Usually people consider it a test to see who can stand their ground longer.

A．What is it that

B．Why is it that

C．What it is that

D．Why it is that

结核性腹膜炎病人有腹膜广泛粘连时，禁用的检查是（）

A.腹水浓缩涂片找结核菌

B.腹水培养结核杆菌

C.腹水动物接种

D.腹水常规检查

E.腹腔镜检查