数据词典的结构是( )
A．按字典序排列的命名数据流
B．自顶向下、逐步分解的分层结构
C．数据项条目的集全
D．自底向上、逐步归纳的分层结构
参考答案：B
根据句意及首字母提示，补全句子。
1. Can you t_____ this English sentence into Chinese?
2. Which kind of English study m_____ can you learn from this passage? Remember to choose one that
fits you best.
3. It is important for you to buy a g_____ book when you learn a foreign language.
4. Do you learn anything else b_____ Chinese at school?
5. — Whenever you need help, telephone me.
— Good idea. I wish I wouldn't meet any d_____.
建设工程设计合同中没有（）费用。
A.进度款
B.预付款
C.结算款
D.定金
