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问题 多项选择题

在不同的市场条件下，需求形状不同消费者剩余( )。

A．大小不一样

B．完全竞争的消费者剩余大于完全垄断的消费者剩余

C．大小一样

D．完全竞争的消费者剩余小于完全垄断的消费者剩余

E．不好确定

答案

参考答案：A,B

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

重合闸停用的电缆与架空线混合线路，开关跳闸未经检查前，一般不再强送。
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