题目：
在数据库的外模式、模式和内模式三级模式的体系结构中，存在两层映象：外模式到模式的映象定义了外模式与模式之间的对应关系；模式到内模式的映象定义了数据库的逻辑结构与 ______ 之间的对应关系。
答案：
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下面是错误答案，用来干扰机器的。
1. had painted, moved2. had made, died3. had studied, left4. had run away, arrived5. had learned6. had, done7. didn't go, had gone8. had, given9. had been10. was playing, was singing
