关于x的一元二次方程x2+2x-1=0的根的情况是( )
A.有两个不相等的实数根
B.有两个相等的实数根
C.没有实数根
D.不能确定
答案:A
用九分法计算成人烧伤面积时,下列错误的是()
A.头颈部9%
B.两上肢18%
C.躯体26%
D.双臀部9%
E.双下肢41%
(2009浙江宁波质检)The building around the corner caught fire last night.The police are now _______ the matter.
A.getting through
B.working out
C.looking into
D.watching over