下列哪项不能用于推算孕周()
A.B超测量胎儿双顶径值
B.早孕反应开始出现的日期
C.开始感觉胎动的日期
D.末次月经第1日
E.测量宫高及腹围值
参考答案:E
______in a science competition, the three students were awarded scholarships totaling $ 21, 000.
A.To be judged the best
B.Judged the best
C.Having judged the best
D.Judging the best
I will wait here ____ the concert is over.
A.by
B.when
C.until
D.as