关于肺部孤立性结节或肿块，其分叶征象最常见于()
A．肺癌
B．转移性肿瘤
C．良性肿瘤
D．结核球
E．肺囊肿
参考答案：A
利用数字高程模型可以计算( )。
A．坐标方位角
B．坡度
C．坡向
D．土石方量
E．地表面积
— I'm surprised to hear that Sue and Paul have _____.
— So am I. They seemed very happy together when I last saw them. [ ]
A. broken up
B. finished up
C. divided up
D. closed up
