若函数f(x)=x2-2|x|-m的零点有两个,则实数m的取值范围是[ ]
A.-1<m<0
B.m>0或m=-1
C.m>0或-1≤m<0
D.0<m<1
答案:B
146. I _____ stiff after sitting so long, and could hardly walk.
A.freeze
B.was frozen
C.was freezing
D.Froze.
AG增高提示体内有()
A.高氯血性呼吸性碱中毒
B.低氯血性呼吸性酸中毒
C.低氯血性代谢性碱中毒
D.下常氯血性代谢性酸中毒
E.高氯血性代谢性酸中毒