患者男，32岁，突然肛门旁肿痛，可触及结块，当咳嗽和排便时加重，应考虑为（）
A.血栓外痔
B.结缔组织外痔
C.内痔
D.肛痈
E.脱肛
参考答案：A
My teacher has never lost his temper; that is to say, he is a _____ man. [ ]
A. generous
B. mild
C. rude
D. tough
遥测站雨量与人工观察的降雨量不相等，有几种可能？
