胰腺癌与慢性胰腺炎均可在十二指肠降部出现3字征。
参考答案:错
I've read the letter twice, but I can't make any ________ of it at all.[ ]
A. sense
B. meaning
C. explanation
D. idea
一个圆柱和一个圆锥的底面积相等,圆柱和圆锥的体积比是3:2,圆柱和圆锥的高的比是[ ]
A.1:2
B.1:3
C.3:1