呼吸困难伴发热可能诊断为（）.
A.支气管哮喘
B.脑出血
C.大叶性肺炎
D.肺脓肿
E.急性左心衰
参考答案：D
The boy made the same mistakes __________,which,of course,made his parents very angry.[ ]
A．over and over again
B．more or less
C．sooner or later
D．here and there
构成条码的基本单位是( )，其宽度通常以mm或mil为单位。
A．条
B．模块
C．空
D．数据符
