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
He knows to study at his best, so he still does a good job even when he spends as much time playing
computer games as he _________. [ ]
A. is studying
B. does studying
C. has studying
D. studies
最先开展个人汽车贷款业务的银行是( )。
A．中国银行
B．中国农业银行
C．中国建设银行
D．中国工商银行
