不支持纵隔肿瘤诊断的是（）

A.透视下转动病人，肿块基底部及边缘与纵隔不能分离

B.深呼吸时肿块随呼吸上、下移动

C.纵隔肿块有宽的基底与纵隔相连

D.肿块的边缘与纵隔边缘之夹角为钝角

E.肿块最大上下径在纵隔内

What is the size of Larsen B ice shelf before it disintegrated in the 1900s
a. It covered more than 2,000 square kilemeters, and was 300 meters thick.
b. It covered more than 3,000 square kilemeters, and was 100 meters thick.
c. It covered more than 3,000 square kilemeters, and was 200 meters thick.
d. It covered more than 2,000 square kilemeters, and was 100 meters thick,