A poet and artist with high fame ______ coming to speak to us about Chinese literature

and painting tomorrow afternoon.

A．is

B．are

C．was

D．were

左心衰早期最具特征性的临床表现是（）

A.劳力性呼吸困难

B.阵发性夜间呼吸困难

C.哮鸣音及吸气性呼吸困难

D.带有哮鸣音的呼气性呼吸困难

E.端坐呼吸