承包期内，发包方不能收回承包地。

国库集中收付制度也称为（）。

A.国库集中支付制度

B.国库收入收缴制度

C.国库单一账户制度

D.国库集中管理制度

He found it increasingly difficult to read, ______ his eyesight was beginning to fail.

A．though

B．for

C．but

D．so

—_____bargaining is so interesting?

—Sometimes it is a test to see who stand their ground for the longest.

A．What is it that

B．Why is it that

C．What it is that

D．Why it is that

病人长时间表现膀胱刺激症状和脓尿，应首先考虑为

A．急性肾小球肾炎

B．肾结石

C．输尿管结石

D．泌尿系结核

E．急性膀胱炎

确定腹腔内脏损伤最有价值的方法是（）。

A．X线检查

B．腹部体检

C．B型超声检查

D．腹腔穿刺

E．CT检查