【名词&注释】
链球菌(streptococcus)、体外受精(in vitro fertilization)、牙周组织(periodontium)、干髓术(pulp mummification)、同源人工授精(artificial insemination by husband)、异源人工授精(artificial insemination by donor)、无性生殖(asexual reproduction)、牙髓切断术(pulp amputation)
[单选题]目前,我国禁止的生殖技术是
A. 人工授精
B. 同源人工授精
C. 异源人工授精(artificial insemination by donor)
D. 无性生殖(asexual reproduction)
E. 体外受精