诊断纵隔畸胎瘤的特征性CT征象是()
A.肿块位于上纵隔
B.肿块有分叶
C.增强扫描肿块边缘环形强化
D.肿块内出现脂肪一液体平面
E.囊内液体的CT密度不一
参考答案:D
乘法算式5×6=30中,5叫因数,6叫积。[ ]
Sorry, I'm busy today. I have _______ homework to do. [ ]
A. much too
B. too much
C. too many
D. many too