类别转换(class switching)]

Sean got a job of 　 at a fast-food restaurant. A: wait for tables B: waiting for tables C: waiting tables D: /

报文交换（message switching）无需进行报文拆分与重组，因此比分组交换（packet switching）效率高。

"To turn the tables" means ______. A: to move the tables B: to carry the tables away C: to gain courage D: to gain an advantage after having been at a disadvantage

New oak tables are normal goods. What would happen to the equilibrium price and quantity in the market for oak tables if the price of maple tables rises, the price of oak wood rises, more buyers enter the market for oak tables, and the price of wood saws increased?

Tables and Figures should:

Tables are made of________.

While designing the database for one of your online transaction processing （OLTP） applications， you want to achieve the following：  a） high availability of data  b） faster primary key access to the table data  c） compact storage for the table  Which type of tables would you use to achieve these objectives？（） A: heap tables B: object tables C: partitioned tables D: index­organized tables （IOTs）

While designing the database for one of your online transaction processing （OLTP） applications， you want to achieve the following： a） high availability of data b） faster primary key access to the table data c） compact storage for the table Which type of tables would you use to achieve these objectives？（） A: Aheap tables B: Bobject tables C: Cpartitioned tables D: Dindex­organized tables （IOTs）

Which two are true regarding external tables？ （） A: AExternal tables can be updated. B: BExternal tables are read-only tables. C: CIndexes can be created on external tables. D: DIndexes cannot be created on external tables.