脊髓有____个节段，其中颈髓____节，胸髓____节，腰髓____节，骶髓____节，尾髓____节。
参考答案：31；8；12；5；5
How's the weather today? [ ]
A. It is cold and windy.
B. It is young.
C. It's here.
从帝王陵寝的形式来看，唐太宗的昭陵和武则天的乾陵都属于（）式。
