一元二次方程2x2+2x+1=0的根的情况为[ ]
A.有两个相等的实数根
B.有两个不相等的实数根
C.只有一个实数根
D.没有实数根
答案：D
It was not so much the many blows he receivedthe lack of fighting spirit that led to his losing the job. ( )
A．for
B．of
C．as
D．like
