已知，二次函数f(x)=ax2+bx+c的部分对应值如下表，则f(-3)=。x－

根据短文内容，选择最佳答案。

    Dinner, for English people, is the richest meal of the day and is very formal (正式的) meal. Many people even

wear special clothes for dinner, so, if you are asked out to dinner, you must find out whether you are expected

to wear a dinner suit. When you get there and you find you are the only person in ordinary clothes, you will feel

unhappy and worried. Dinner is usually served at about half past seven. All the members of the family sit down

together and are on their best behavior (举止). The head of the family sits at the other. If there is a guest (客人),

he usually sits on the right of the lady of the house. If there are several guests, the most important one is asked

to sit there. While the meal conversation is carried on, you should try to get into conversation with the person on

your right or left, but you should not try to talk to someone who is long way from you.

1. In England, if your family are asked out to dinner, _____ will sit on the right of the housewife. [ ]

A. your sister

B. your father

C. your mother

D. you

2. When you go to dinner together with other guests, you should try ______ at table. [ ]

A. to talk only with the lady of the house

B. to talk as loudly as you can

C. to talk with each of the other guests

D. to talk with the person beside you

3. In England if you wear special clothes for dinner, it shows that _______. [ ]

A. you are a special person

B. you are a rich man

C. you are a man with good behavior

D. you are the most important guest

4. Which of the following shows English dinner is different from Chinese dinner? [ ]

A. People have rich dinners when they celebrate their festivals.

B. The important guest usually sits on the right of the lady of the house.

C. The guests usually wear special suits for formal meals.

D. The dinner is usually served in the middle of the day or the evening.

5. From this passage, we may know _______. [ ]

A. English families often serve dinners to guests

B. English people are too rich

C. the person with good behavior is often asked to dinner

D. English people are usually on good behavior at dinner

试题一（15 分）阅读以下说明，回答问题 1～6，将解答填入答题纸对应的解答栏内。【说明】某公司已有一个 100 用户的有线局域网。由于业务的发展，现有的网络不能满足需求，需要增加40 个用户的网络连接，并在公司客户接待室连接网络以满足合作伙伴实时咨询的需求。现结合公司的实际情况组建无线局域网，具体拓扑如图1-1 所示。

图 1-1图1-1 中PC1 的无线网卡配置信息如图1-2 所示。

图 1-2

【问题 4】（3 分）IEEE 802.11 中定义了哪两种拓扑结构？简述这两种拓扑结构的结构特点。图1-2 中“Operating Mode”属性的值是什么？

绝对节税和相对节税，都是纳税人基于没有任何风险前提下的少纳税或不纳税，即税务筹划中没有风险或不用考虑风险。实际上无论绝对节税还是相对节税，往往都存在一定的风险。税务筹划是一种经济行为，在错综复杂而又不断发展变化的经济和社会现实环境中，所有的经济行为都有风险，只不过风险程度不同而己。很多情况下节税与风险成正比，节税越多，风险（）。

A．越小

B．越大

C．相同

D．不变

千分尺测量面的（）通常是同时研磨修理的。

A、平面度和平行度

B、平面度和准确度

C、准确度和平行度

D、平行度和精密度

对于凝汽器冷却水温升的大小，在凝汽量一定时，（）。

A、由于汽化潜热为2135～2219kJ／kg，故温升为常数；

B、凝汽器的传热系数值越大，则温升越大；

C、冷却水量越小，则温升越大；

D、冷却水流程越多，则温升越大。