题目: 人在生殖过程中,形成受精卵的地方是在( )A.子宫B.输卵管C.卵巢D. * * 答案: 生殖细胞包括睾丸产生的精子和卵巢产生的卵细胞,含精子的精液进入 * * 后,精子缓慢地通过子宫,在输卵管内与卵细胞相遇,精子进入卵细胞,与卵细胞相融合,形成受精卵;所以受精卵的形成部位在输卵管.故选B
题型:选择题 —Sorry, sir. And you'll let me pay to have your jacket cleaned, won't you?—That's all right. Coffee ________ lasting marks on clothing, I'm sure.A.didn't leaveB.doesn't leaveC.hasn't leftD.hadn't left 查看答案