The football fans (球迷) yelled _______ their team.[ ]
A. at
B. up
C. for
D. with
答案:C
解方程:
(1)x2+4x+3=0
(2)3x2-5x-2=0.
营养性缺铁性贫血的主要病理基础是()
A.肝肾阴虚
B.血虚不荣
C.肌肤失养
D.阴虚火旺
E.脾胃虚损