民间主导型产业规制的核心是（）。
A.企业与政府之间的协调
B.保证企业在市场上的自由
C.保障市场自由与有效
D.侧重政府对企业的引导
参考答案：B
Our playground is not so tidy and beautiful as before. Students must _____ dirty things on it.
A．be stopped to throw
B．be stopped from throwing
C．stop to throw
D．stop from throwing
宫体癌的CT表现是（）
A.增强扫描肿瘤内坏死不增强
B.宫体癌不侵犯附件
C.子宫增大密度不均
D.可见子宫积水、积血或积脓
E.可见宫颈增大
