延迟扫描病灶呈低密度改变为肝血管瘤的特征性改变。（）
参考答案：错
He asked ____ for the computer. [ ]
A. did I pay how much
B. I paid how much
C. how much did I pay
D. how much I paid
在Java中，表示换行符的转义字符的是( )。
A．\n
B．\f
C．'n'
D．\dd
