井下变电所运转员进行停送电操作时,必须做好()电记录。
A、停
B、送
C、停送
参考答案:C
原发性肝癌进行肝动脉栓塞治疗时常用的栓塞剂是:()
A.碘化油化疗药物乳剂
B.PVA
C.无水乙醇
D.明胶海绵
E.金属弹簧圈
____ a pity ____ was to miss the train! [ ]
A. What; it
B. How; it
C. How: that
D. What; this