骨巨细胞瘤治疗方案的确定决定于（）
A.X线表现
B.临床表现
C.GTM分级
D.病理检查
E.放疗后有否恶变
参考答案：C
One day Chuck is on a flight ______ the Pacific Ocean suddenly ______ his plane crashed.
A. through while B. through whenC. across when D. across while
采用不等高塔腿式基础的主要优缺点有哪些？
