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问题 填空题

读出游标为20分度(测量值可准确到0.05 mm)的游标卡尺和螺旋测微器示数

__________mm                                     __________mm

答案

0.15mm    5.668mm

20分度游标卡尺的原理

主尺的最小分度是1mm,游标尺上有20个小的等分刻度它们的总长等于19mm，因此每一分度与主尺的最小分度相差0.05mm。

游标卡尺的读数为：

螺旋测微器

原理：精密螺纹的螺距为0.5mm，即D每旋转一周， F前进或后退0.5mm。可动刻度 E上的刻度为50等份，每一小格表示0.01mm。

螺旋测微器读数为：

阅读理解
Canberra is the capital of Austrlia. It is a modern and lively city with a pupulation of over 345,000.
History
Canberra is the eighth largest city in Australia It is 238 km from Sydney and 507 km from Melboume. Melbourne was once the capital of Australia. Sydney people also wanted to make their city the capital. It was difficult for the govement to make the decision. Then n 1911, the government chose a pl.ace to build the new apital. It w.as between Sydney and Melbourne, the two
Argest cities in Australia. Jt took more than 14 years to build the city, In 1927, the city was set up.It became the apital and was named Canberra. “Canberra” means “a place for friends to get together”.
 
Cutture
Canberra is a beautiful city with trees and  flowers everywhere. There’s a Flower Festival in Septem ber each year. People can enjoy aii kinds of beautiful flowers and welcome the spring to amve. A man-made lake –Lake Burley Griffin is in the centerof the city, It’s about 25 km fong. People like to ride bikes, walk or run around the lake. In Canberra, there’re many famous universities like the Australian Nationa/ University and the University of Canberra. The National Library and the National Museum of Australia are also famous places that people like to visit.
小题1: How far is Canberra from Sydneyt?
A．25 knLB．238 km.C．345 km. .D．507 km.
小题2:Tboword “Canbena  means ______.
A．the largest cityB．beautiful man-made lake
C．the old capital cityD．a place for friends to get together
小题3:  Canberra Flower Festival is a festival to        .
A．ride bikesB．visit universities
C．welcome the springD． walk around the lake .
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材料分析题

交通为人类社会的政治、经济、文化交往提供了必要的条件。古今中外，们都十分重视交通建设。阅读材料，回答问题。

材料一：国民经济各部门存在密切联系。据测算，建设1公里高速公路要消耗钢材500～1500吨、水泥

4000～12000吨，平均消耗沥青1900吨。新增100亿元投资可带动400亿元投资规模。在建设周期内每亿元高速公路建设可创造：就业岗位3900个。2009年，我国铁路建设投资6000亿元，消耗钢材2000万吨、水泥1．2亿吨，可创造600万个就业岗位，对经济增长的拉动可达1．5个百分点。

材料二：交通运输是制约西南地区经济发展的主要因素，四川省针对其在西南地区的区位特点和省情，在建设西部经济发展高地的过程中，着力打造贯通南北，连接东西，通江达海的西部综合交通枢纽。2008年四川省境内新开工铁路建设项目投资规模1087亿元，开工建设高速公路项目总投资767亿元。2009年四川省交通建设预计完成投资580亿元。运用普遍联系的观点，分析说明四川省打造西部综合交通枢纽的正确性。

运用普遍联系的观点，分析说明四川省打造西部综合交通枢纽的正确性。

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