儿童最常见的脊髓肿瘤是（）
A.髓母细胞瘤
B.少突胶质细胞瘤
C.星形细胞瘤
D.生殖细胞瘤
E.畸胎瘤
参考答案：C
The film was so _____ that soon all the children in the cinema began feeling _____ of it and they went out
one by one. [ ]
A. bored, boring
B. boring, boring
C. bored, bored
D. boring, bored
衡量劳动力效率的指标：
