左前斜位上，心后间隙消失见于（）
A.左心房增大
B.左心室增大
C.右心房增大
D.右心室增大
E.二尖瓣狭窄
参考答案：B
Many young people in the West are expected to leave ________ could be life's most important
decision-marriage-almost entirely up to luck.[ ]
A. as
B. that
C. which
D. what
某直通列车按编组计划规定，在某区段站进行补轴，该区段站应对其进行（）技术作业。
A.无调中转列车
B.始发列车
C.换挂车组的列车
D.部分改编中转列车
ntirely up to luck.[ ]