—_______ those your grandparents?

—No, _______.[ ]

A. Is, they are

B. Are, they are not  

C. Is, it is

D. Are, it isn't

下列哪项不符合急性脊髓炎（）

A.早期有尿便潴留

B.多为横贯性损害

C.病变以颈髓最常见

D.病变以胸髓最常见

E.为急性非特异性炎症