慢性肺心病缓解期临床表现可有（）
A.呼吸衰竭表现
B.肺动脉高压表现
C.右心衰竭表现
D.右心室肥厚
E.慢性阻塞性肺部疾病
参考答案：B, D, E
Today the canal is still being used. Ships can be seen moving on ______ water now and then. But it is no longer ______ busy water highway.
A．a, the
B．the, /
C．/, a
D．the, a
—___________.
—You're welcome.[ ]
A. Thanks a lot.
B. Good morning.
C. How are you?
D. Nice to meet you.
