小题1:If you can swim a________ the river, I’ll be waiting for you on the other side.

小题2:–What do you want to be in the f________?

–I want to become a teacher.

小题3:The nice dress was bought by my uncle as a birthday p_________.

小题4:You’ve d_________ so much wine. You mustn’t drive.

小题5:He’s poor at spelling. He made a lot of spelling m__________ in his writing.

在数据库的三级模式体系结构中，外模式与模式之间的映像(外模式/模式)，实现了数据库的 【10】 独立性。