连续多普勒技术中取样线上的标记代表的是()。
A.仅计算此处的血流信息
B.取样容积大小
C.此处检测的速度最大
D.此处检测的速度最佳
E.此处为发射超声束的聚焦区
参考答案:E
槟榔治食积气滞,泻痢后重,与其何项功效有关()
A.利水消肿
B.杀虫
C.消积导滞
D.行气
E.缓泻通便
Rather than focus on explanation of grammatical rules in classroom teaching, the teacher of an Oral Approach class must encourage direct and ______ use of the target language in the classroom.