超声检查至少在妊娠几周后才能较好地看到胎儿() A.2周 B.4周 C.6周 D.8 发布时间:2018-09-10 17:37 │ 来源:www.tikuol.com 题型:单项选择题 问题: 超声检查至少在妊娠几周后才能较好地看到胎儿()A.2周B.4周C.6周D.8周E.9周
题型:单项选择题 . To save class time, our teacher has ___ students do half of the exercises in class and complete the other half for our homework. A.usB.weC.ourD.ours 查看答案