参考答案:IUI:IUI means intrauterine insemination with washed sperm, getting rid of the seminal plasma, which contains lots of prostaglandins and being able to put the sperm themselves in the uterine cavity without reaction.
jpg是图片格式文件的扩展名;.wav是音频格式文件的扩展名;.txt是文本文件的扩展名;.htm是网页文件的扩展名。所以本题选B。
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