三尖瓣狭窄的X线检查可见右房缘距中线的最大距离为()
A.>4cm
B.>5cm
C.>3cm
D.>1cm
E.>2cm
参考答案:B
As is shown in the movie, under no circumstances __________ faith and confidence.
A.you should lose
B.shouldn’t you have
C.should you lose
D.you shouldn’t lose
黄土高原是世界上黄土层最为深厚的地区,它的地表特征是( )
A.地势平坦
B.雪山连绵
C.千沟万壑
D.地面崎岖