开始植入子宫内膜发育的是[ ] A.卵细胞 B.受精卵 C.胚泡 D.精子和卵细 发布时间:2017-06-21 18:05 │ 来源:www.tikuol.com 题型:选择题 问题: 开始植入子宫内膜发育的是[ ]A.卵细胞B.受精卵C.胚泡D.精子和卵细胞
题型:选择题 ----Is that Tom speaking?----Sorry, he is out now. He _______ the cinema with his classmates.A.has been toB.has gone toC.have been to;D.have gone to 查看答案