呕吐最常见于何病 （）
A.急性胃炎
B.心源性呕吐
C.幽门梗阻
D.尿毒症
E.颅脑疾病
参考答案：A, C
If you want to keep healthy, you'd better eat _ vegetables. [ ]
A. less
B. more
C. little
D. few
下列可用于肺痈、肠痈的药是
A．丹皮B．薏苡仁C．大黄D．鱼腥草
