脊髓空洞症（）。
A.累及脊髓前角细胞
B.累及脊髓前根
C.累及脊髓后索
D.累及脊髓后根
E.累及脊髓前索
参考答案：A
— Let's go for a walk, shall we?
— It's too late now; ________, it's beginning to rain. [ ]
A. in addition
B. in a word
C. as a result
D. in general
试述广播电视节目选题计划的编制。
