下列哪种操作属于非血管系统介入放射学范畴()。
A.肾动脉扩张术
B.肾囊肿穿刺治疗
C.内科性肾切除
D.肾动脉血管内支架留置术
E.肾外伤出血栓塞治疗
参考答案:B
Farmers are more anxious for rain than people in cities because they have more at ______.
A. danger B. stake C. loss D. threat
陆军担负有哪些任务?