关于早期绒毛活检,错误的是A.绒毛可用于分析胎儿的遗传特征B.绒毛活检的最佳时间是孕 发布时间:2017-12-11 13:42 │ 来源:www.tikuol.com 题型:单项选择题 问题: 关于早期绒毛活检,错误的是A.绒毛可用于分析胎儿的遗传特征B.绒毛活检的最佳时间是孕6~9周C.可用于染色体检查D.早孕绒毛活检严重影响胎儿发育E.早孕绒毛活检可能导致流产
题型:单项选择题 Peter's jacket looked just the same as Jack's, but it cost ________ his.[ ]A. as much twice as B. twice as much asC. much as twice as D. as twice much as 查看答案