—I am searching one online shopping site after another for a computer.

—So __________I before I decided to buy a new camera.

A．had

B．have

C．am

D．would

最具幽门梗阻特征的典型症状是

A．阵发性腹痛

B．消瘦

C．呕吐宿食

D．食欲下降

E．腹胀伴肠型