Smith’s jacket looked just the same as Jack’s, but it cost __________ his. A. as much twice as B. much as twice as c. as twice much as D. twice as much as
I saw a woman running to ward me in the dark.Before I could recognize who she was，______she had run back in the direction she had come. A.of which B.by which C.in which D.from which
相切于点 B(2,1)．则圆C的方程为 .15
