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问题 多项选择题

在销售与收款的管理环节中，（）问题是财务恶化的早期信号。

A、销售的非预期下跌

B、交易记录恶化

C、退货增加

D、平均收帐期延长

E、非计划的存货积压

答案

参考答案：A, B, D, E

选择题

Lillian doesn't know _____ she should bring a present.[ ]

A. if    

B. whom  

C. as    

D. what
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单项选择题

Most computer systems are (165) to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be (166) to an outsider attack by preventing (167) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (168) users. Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks. These attacks are usually (169) by tools referred to as Intrusion Detection Systems.

A．visit

B．access

C．I/O

D．read/write
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