问题
选择题
Lucy is as _____ as Lily. [ ]
A. carefully
B. careful
C. more careful
D. more carefully
答案
答案：B
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Lucy is as _____ as Lily. [ ]
A. carefully
B. careful
C. more careful
D. more carefully
答案：B
倍，则该圆锥侧面展开后的扇形所对的圆心角为( )． 