急性阑尾炎表现为
A.右下腹痛,麦氏点有压痛B.右上腹钻顶样疼伴呕吐C.腹痛、便闭、肠鸣音亢进D.上腹部绞痛反复发作伴黄疸E.突然上腹部绞痛伴腹肌板状硬
参考答案:A
We were in our investigation(调查)by the cooperation of the local police. [ ]
A. stopped
B. cooperated
C. aimed
D. aided
下列四幅热力环流的画法,正确的是()
A.A
B.B
C.C
D.D