胚胎移植技术中，对供体动物进行超数排卵处理，必须配合治疗的药物是
A、孕酮和雌二醇C
暂无解析
It’snecessary_________usallto________
Theprimaryschool____(在孩提时代我在那里学习)hadverylittleequipment.
Theoldmanlivesinavillage_______,butheneverfeels________.
Hetalkedaboutthemenandbooks____interestedhimgreatlyintheschool.
It’snecessary______ustokeepourpetscleaneveryday.
