预算线的斜率可以表示为两种商品价格之比的负值。()
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8088CPU对存储器进行读写操作时,在总线周期的T1状态时输出什么?
Your application regularly issues the following statement: SELECT * FROM BANK_ACCT WHERE ACCT_BALANCE BETWEEN 1000 and 10000; Which of the following database objects would be inappropriate for use with this statement?()
A. Materialized views
B. Indexes
C. Index-organized tables
D. Hash cluster
结账时,全年累计发生额下通栏划单红线。
A. 正确
B. 错误