如果发现精密坐标镗床刻线尺在全长上任意两刻线间的（）超差，可到计量室进行鉴定，如刻线

Section C (12 points)

Directions: Complete the following passage by using ONE word that fits the context.

Shopping habits in the United States have changed greatly in the past few decades.   48    in the 1900s most American towns and cities had a Main Street. Main Street was always in 49 heart of a town. This street was built on both sides with many varied businesses. Here, shoppers walked into stores to look at all sorts of goods. _50__in the 1950s, a change began to take place .Too many automobiles had crowded into Main Street while too__51_­­­­­­­­parking places were available for shoppers. _52__the streets were crowded, merchants began to look with interest at the open spaces from the city limits. Open space is what their car-driving customers needed.

An open space is  53 they got when the first shopping centre was built. Shopping centres, or rather malls, were set __54_ as a collection of small new stores near crowded city centres. Towards the late 1970s,many shopping malls had almost developed into small cities themselves. In addition to providing the cheapness of one stop shopping, malls were transformed into landscaped parks, _55__benches, fountains, and outdoor entertainment.

甲、乙两人在400米圆形跑道上进行10000米比赛，两人从起点同时出发，开始时甲的速度为每秒8米，乙的速度为每秒6米。当甲每次追上乙后，甲的速度减少每秒2米，乙的速度减少每秒0.5米。这样下去，直到甲发现乙第一次追上自己开始，两人都把速度每秒增加0.5米，直到终点。那么领先者到达终点时，另一个人距终点多少米（）

A．

B．

C．80

D．110

肝脏的血液供应来自门静脉的约占（）。

A.30-35%

B.40-45%

C.50-55%

D.60-65%

E.70-75%

问答。

一、《骆驼寻宝记》一开头，作者就用极简练的语言高度概括地写了禽兽国地各种动物急切地要去寻宝地情景。找出课文中用来表现动物们急切心情及渲染寻宝场面的语句，体会这样写的好处。

答：_____________________________________________________________

二、  本文的题目是《骆驼寻宝记》，为什么写那么多的动物都去寻宝？

答：_____________________________________________________________

三、骆驼在寻宝途中遇到哪些困难？它是怎样对待的？

答：_____________________________________________________________

四、学了这篇课文，你怎样理解骆驼寻到的宝？你有何感想？写出来，和同学交流一下。答：_____________________________________________________________

五、认真想想，本篇童话对我们有什么样的深刻寓意？

答：_____________________________________________________________

以下关于宽带城域网组建基本原则的描述中，错误的是（）。

A．组建的宽带城域网一定是可管理的

B．宽带城域网的可盈利性是运营商首先要考虑的问题

C．要组建可运营的宽带城域网，首先要解决技术选择和设备选型问题

D．宽带城域网可以一步到位，不必考虑网络的可扩展性