已知菱形的两对角线长分别为6cm和8cm,则菱形的面积为( )cm2.
24.
This is the book which you bought it for me ten years ago.
肺痈溃脓期的症状表现有()
A.吐脓血痰
B.时时振寒发热
C.胸痛
D.发热、恶寒轻或不恶寒
E.脉滑数