【名词&注释】
伦理学(ethics)、体外受精(in vitro fertilization)、故意伤害(intentional injury)、同源人工授精(artificial insemination by husband)、手术同意书(operation permit)、异源人工授精(artificial insemination by donor)、无性生殖(asexual reproduction)
[单选题]用γ相机进行局部骨髓平面显像时首次预设计数应大于
A. 100k
B. 200k
C. 300k
D. 400k
E. 500k