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问题 多项选择题

我国《土地法》规定“( )，可以依法确定给单位或者个人使用。使用土地的单位和个人，有保护、管理和合理利用土地的义务”。

A．城市土地

B．农村土地

C．自留地

D．国有土地

E．农民集体所有的土地

答案

参考答案：D,E

选择题

如图所示为某传感装置内部部分电路图，RT为正温度系数热敏电阻，其特性为随着温度的升高阻值增大；R1为光敏电阻，其特性为随着光照强度的增强阻值减小；R2和R3均为定值电阻，电源电动势为E，内阻为r，V为理想电压表。若发现电压表示数增大，可能的原因是 （  ）

①热敏电阻温度降低，其他条件不变   ②热敏电阻温度升高，其他条件不变

③光照减弱，其他条件不变           ④光照增强，其他条件不变

A．①③

B．①④

C．②③

D．②④
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单项选择题

Remote administration types are an example of one kind of (71) malicious software, the Trojan horse, or more simply Trojan. The purpose of these programs isn’t replication, (72) to penetrate and control. That masquerade as one thing when in fact they are something else, usually something destructive. There are a number of kinds of Trojans, including spybots, (73) report on the Web sites a computer user visits, and keybots or keyloggers, which record and report the user’s keystrokes in order to discover passwords and other confidential information.

RATS attempt to give a remote intruder administrative control of an infected computer. They work as (74) pairs. The server resides on the infected machine, while the client resides elsewhere, across the network, where it’s available to a remote intruder. Using standard TCP/IP or UDP protocols, the client sends instructions to the server. The server does (75) it’s told to do on the infected computer.

（71）处填（）。

A．nonviral

B．unviral

C．inviral

D．abviral
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