LKJ数据文件电子文档应通过（）或规定的专门网络发送。
参考答案：铁路综合IT网
介词填空。
1. Where do you usually hang _____ with your friends?
2. The drugstore is _____ the bank and the bookstore.
3. The staff dress up _____ clowns.
4. They can find good food _____ the Farmer's Market.
5. Parents can take dance lessons _____ the beach.
6. They spent happy hours walking _____ the forest.
7. There's a bank _____ Oak Street.
《拍卖法》中确定拍卖的基本原则是（）、（）、（）、（）原则。
