左心衰竭与支气管哮喘的主要鉴别点为()
A.肺部干湿啰音
B.夜间呼吸困难
C.伴咳嗽
D.坐起时能够缓解呼吸困难
E.伴气喘
参考答案:D
79. Before there goes the bell for class, our math teacher took out a piece of and wrote his problems on the blackboard.
A.brush pen
B.chalk
C.paper
D.Pencil
美学的主要内容不包括?()
A、自然美
B、社会美
C、艺术美
D、心灵美