心尖区闻及隆隆样舒张期杂音,应考虑为()
A.二尖瓣关闭不全
B.主动脉瓣关闭不全
C.二尖瓣狭窄
D.肺动脉瓣狭窄
E.三尖瓣关闭不全
参考答案:C
----- do you visit your grandparents?
-------Once a month.
A How soon B How long C How much D How often
报检单位必须在检验检疫机构注册登记,报检时填写登记号;报检员在报检时应该出示报检员证。 ( )