肠阿米巴病最常见的重要并发症是()
A．肠出血
B．肠穿孔
C．阿米巴肝脓肿
D．结肠肉芽肿
E．阑尾炎
参考答案：A
Tom _______ his homework at home. [ ]
A. doesn't
B. don't do
C. don't does
D. doesn't do
诊断用X射线机房的副防护铅当量厚度应是（）
A.0.5mm
B.1.0mm
C.1.5mm
D.2.0mm
E.2.5mm
