胸骨右缘第二肋间闻及吹风样收缩期杂音,见于()。
A.肺动脉瓣狭窄
B.主动脉瓣狭窄
C.肺动脉瓣关闭不全
D.主动脉瓣关闭不全
E.二尖瓣关闭不全
参考答案:B
Today, we'll discuss a number of cases _____ beginners of English fail to use the language properly.
[ ]
A. which
B. as
C. why
D. where
对客户填单指导时,大堂经理要五指并拢,掌心向上,指向阅读内容。()