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问题 选择题

The secretary is very careful and never ___ any little points in her daily work.

A．overcomes

B．overlooks

C．refuses

D．denies

答案

答案：B

动词辨析。Overcome克服，战胜；overlook忽视，检查； refuse拒绝，抵制；denies否认，拒绝。句意：这个秘书非常小心，在日常工作中从来没有忽视一点事情。故选B。

问答题

（1）某同学用电流表和电压表测一节干电池的电动势和内电阻，实验中连接的实物图如右图所示（导线上有编号），图中有一根导线连接错误，他接错的导线是______（写编号），按他这种接法在实验时会出现什么情况？

答：______．

（2）如果实验时只允许使用一个电表，其他仪器可以自行选择，请在右边虚线框内画出相应的实验电路图．

（3）（多选题）第（2）问电路中的电阻可以选择的是：______

A．最大阻值为20欧的滑动变阻器

B．最大阻值为2000欧的滑动变阻器

C．最大阻值为9999欧的电阻箱

D．阻值分别为20欧和10欧的两个定值电阻．
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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．searched

B．checked

C．tested

D．detected
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