诊断纵隔畸胎瘤的特征性CT征象是()
A.肿块位于前上纵隔
B.肿块有分叶
C.肿块内有齿样骨化
D.肺内转移
E.以上都不是
参考答案:C
A few people were killed in the fire, but _____ were saved.
A.the most
B.most of them
C.most of whom
D.most
Cache的一个重要指标是 【10】 ,即在有Cache的系统中,CPU需要访问的数据存Cache中能直接找到的概率。