尿17-OHCS水平可以反映（） A.肾上腺皮质功能 B.肾上腺髓质功能 C.甲状腺

That night I felt especially lazy and went to bed ____ earlier than usual.

A．quite

B．rather

C．fairly

D．so

He had studied hard , he would have been able to pass the exam.

A．He had studied harder

B．If only he studied more

C．Had he studied harder

D．When he studied more

上消化道大出血表现为呕血还是便血，取决于()

A．出血部位

B．出血速度

C．出血量

D．出血时间

E．出血量与贫血是否成比例

患者，男，60岁，进行性厌食和上腹部胀痛，进食发噎，日益消瘦半年。肝功能正常，大便隐血试验持续阳性。应首先考虑的诊断是（）

A.慢性胃炎

B.胃癌

C.胃溃疡

D.肝癌

E.慢性肝炎

关于小儿急性阑尾炎，错误的是（）

A.病情发展快且重

B.右下腹体征明显

C.穿孔率达30%

D.并发症及死亡率较高

E.宜早期手术