地西泮中毒的血药浓度范围是()
A.1~10μg/ml
B.1~20μg/ml
C.1~25μg/ml
D.1~30μg/ml
E.10~30μg/ml
参考答案:D
已知二次函数f(x)=x2+bx+c满足:f(x+1)﹣f(x)=2x,且f(0)=1.
(1)求f(x)的解析式;
(2)求f(x)在区间[0,2]上的最大值与最小值.
He wants to know _____ .
A.where Nina lives
B.where does Nina live
C.how does Nina get to school
D.how Nina get to school