动脉瘤样骨囊肿的特征()。
A.边缘无钙化或骨化影
B.有液-液平面、无增强
C.边缘硬化,可有液-液平面
D.无病理性骨折
E.边缘无硬化,无液-液平面
参考答案:C
设 int x=5; x+==x-=x*x; 则x的值是______。
There have been several new events ______ to the program for the 2008 Beijing Olympic Games. [ ]
A. add
B. to add
C. adding
D. added