丙基硫氧嘧啶治疗甲亢过程中，下列哪种情况需停药处理（） A.规则用药已6个月，甲亢仍

食物是引起龋病的因素之一，以下观点错误的是（）

A.食物在牙面滞留会引起龋

B.吃糖量比吃糖次数对于龋的发生更重要

C.食物物理性状与龋病发生密切相关

D.食物糖含量与龋发生有关

E.蔗糖必须通过细菌作用才能致龋

已知物种A的化石比物种B的化石在地层中出现的时间晚得多，由此可知[ ]

A．物种A比物种B数量多    

B．物种A比物种B结构复杂

C．物种A一定从物种B进化而来

D．物种B一定从物种A进化而来

瘿病证属肝火旺盛者，最佳选方是

A．栀子清肝汤

B．丹栀逍遥丸

C．龙胆泻肝汤

D．二冬汤

试题五（25 分）阅读以下关于信息系统安全性的叙述，在答题纸上回答问题1 至问题3。某企业根据业务扩张的要求，需要将原有的业务系统扩展到互联网上，建立自己的B2C 业务系统，此时系统的安全性成为一个非常重要的设计需求。为此，该企业向软件开发商提出如下，要求：（1）合法用户可以安全地使用该系统完成业务；（2）灵活的用户权限管理；（3）保护系统数据的安全，不会发生信息泄漏和数据损坏；（4）防止来自于互联网上各种恶意攻击；（5）业务系统涉及到各种订单和资金的管理，需要防止授权侵犯；（6）业务系统直接面向最终用户，需要在系统中保留用户使用痕迹，以应对可能的商业拆讼。该软件开发商接受任务后，成立方案设计小组，提出的设计方案是：在原有业务系统的基础上，保留了原业务系统中的认证和访问控制模块；为了防止来自互联网的威胁，增加了防火墙和入侵检测系统。企业和软件开发商共同组成方案评审会，对该方案进行了评审，各位专家对该方案提出了多点不同意见。李工认为，原业务系统只针对企业内部员工，采用了用户名/密码方式是可以的，但扩展为基于互联网的B2C 业务系统后，认证方式过于简单，很可能造成用户身份被盗取；王工认为，防止授权侵犯和保留用户痕迹的要求在方案中没有体现。而刘工则认为，即使是在原有业务系统上的扩展与改造，也必须全面考虑信息系统面临的各种威胁，设计完整的系统安全架构，而不是修修补补。

【问题2】（8 分）认证是安全系统中不可缺少的环节，请简要描述主要的认证方式，并说明该企业应采用哪种认证方式。

阅读表达。

阅读下面短文并回答问题(请注意问题后的字数要求)。

〔1〕Secondhand smoke is a byproduct of cigarette, cigar or pipe smoking. Secondhand smoke occurs when tobacco burns or when smokers exhale, and it is inhaled involuntarily by non-smokers.

〔2〕Secondhand smoke___________________.The first is called side stream smoke, which is the

smoke released from the burning end of a cigarette or cigar, or from tobacco burning in the bowl of a

pipe. The second is called mainstream smoke, which is exhaled by a smoker.

〔3〕When nonsmokers are exposed to secondhand smoke, they inhale many of the same

cancer-causing chemicals that smokers inhale. According to the U.S. Surgeon General, cigarette smoke

contains more than 4,000 chemical compounds, including more than 50 cancer-causing chemicals, and at

least 250 chemicals that are either toxic or carcinogenic.

〔4〕Both side stream and mainstream smoke are dangerous to nonsmokers. Side stream smoke is

generated at lower temperatures and under different conditions than mainstream smoke. As a result, it

contains higher concentrations of many of the toxins found in cigarette smoke.

〔5〕Secondhand smoke has been designated as a known human carcinogen by the U.S.

Environmental Protection Agency, the National Toxicology Program, and the International Agency for

Research on Cancer. Secondhand smoke also is listed as an occupational carcinogen by the National

Institute for Occupational Safety and Health.

〔6〕According to the 2006 report by the U.S. Surgeon General, there is no risk-free level of exposure

to secondhand smoke: even small amounts of secondhand smoke exposure can be harmful to people's

health. Separating smokers from nonsmokers, cleaning the air, and ventilating buildings can help.

However, they cannot eliminate the exposure of nonsmokers to secondhand smoke.

1.What is the main idea of the text? (no more than 10 words)

_______________________________________________________________________

2.Which sentence in the text is closest in meaning to the following one?

In whatever way, people can't get rid of the risk of nonsmokers to secondhand smoke completely.

_______________________________________________________________________

3.Fill in the blank in Paragraph 2 with proper words.(no more than 8 words)

_______________________________________________________________________

4.Name at least three ways that will help reduce the harm of secondhand smoke.(no more than 12 words)

_________________________________________________________________________

5.Translate the underlined sentence in Paragraph 3 into Chinese.

______________________________________________________