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问题 单项选择题 A1型题

下列有关兴奋在同一细胞内传导的叙述，错误的一项是（）。

A.是由局部电流引起的逐步兴奋过程

B.可兴奋细胞兴奋传导机制基本相同

C.有髓神经纤维传导方式为跳跃式

D.局部电流强度数倍于阈强度

E.呈电紧张性扩布

答案

参考答案：E

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.

（75）处填（）。

A．that

B．what

C．which

D．those
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单项选择题 案例分析题

营养膳食因素在动脉粥样硬化的发病中起着极为重要的作用

能够升高血胆固醇水平的是（）

A.硬脂酸

B.油酸

C.亚油酸

D.EPA

E.反式脂肪酸
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