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问题 单项选择题

实行定期定额征收方式的个体工商户需要停业的，应当在停业前向税务机关申报办理停业登记。纳税人的停业期限不得超过（　　）。

A．30日

B．二年

C．60日

D．一年

答案

参考答案：D

单项选择题

Most computer systems are (71) to two different groups of attacks：insider attacks and outsider attacks．A system that is known to be (72) to an outsider attack by preventing (73) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (74) 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 (75) by tools referred to as Intrusion Detection Systems．

（75）处填（）。

A．searched

B．checked

C．tested

D．detected
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判断题

CAPP是指计算机辅助设计。
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