最有利于脑外肿瘤定位的CT表现为（）
A.边界不清楚
B.脑皮质受压内移
C.明显增强
D.中线移位
E.颅骨变薄
参考答案：B
Oh, I forget ______ the letter ______ him. So I can't find it anywhere. [ ]
A. to send, to
B. to send, for
C. sending, to
D. sending, for
举例比较矿物的类质同象和同质多象
