肾动脉造影的主要用途有()
A.用于诊断
B.用于栓塞治疗
C.腔内血管扩张
D.用于明确肾的功能
E.用于明确肿瘤的范围
参考答案:A, B, C
8个三位连续自然数能依次被1,2,3,4,5,6,7,8整除,则这8个三位数中最小的是______.
There are __ in the reading room, but many of those books aren’t __ to read. [ ]
A. enough books,enough easy
B. enough books,easy enough
C. book enough,easy enough
D. book enough,enough easy