子宫肌瘤大出血，介入疗法栓塞哪条动脉（）
A.髂内动脉前干的分支
B.髂外动脉
C.腹主动脉
D.闭孔动脉
E.髂内动脉前干的终支
参考答案：A
将一个总体为A、B、C三层，其个体数之比为5：3：2．若用分层抽样方法抽取容量为100的样本，则应从C中抽取______个个体．
Taiwan, which is a province of China, lies______ China. [ ]
A. in the southeast of
B. on the southeast of
C. off the southeast of
D. to the southeast of
