- The speaker is a tall man with glasses.

- Then it_____ be Mr. Smith, who is short and thin.

A．wouldn't

B．won't

C．mustn't

D．can't

手术后早期恶心、呕吐的常见原因是

A．颅内压增高

B．麻醉反应

C．术后腹胀

D．肠梗阻

E．低血钾