【名词&注释】
体外受精(in vitro fertilization)、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)
[单选题]体位倾斜多少度时进行脾脏的纵切扫查:
A. 15° B. 45°~50° C. 60° D. 70°~90°