城市的社会、经济和物质结构的基本组成部分是( )。A．城市交通 B．城市交通系统

某地农民贾某的父母收藏了一幅齐白石的画，一直秘而不宣。其父去世后，贾某收拾遗物时发现了该画。由于贾某文化不高，不知道齐白石画的价值。一日，某市一国家干部刘某下乡检查工作，住在贾某家，发现了这幅画。于是，刘某以极低的价格买下了这幅画。后来，贾某通过电视知道了齐白石画的价值，便通过十分曲折的途径找到刘某，要求刘某退回该画。刘某以双方都是自愿买卖，不存在威胁、欺骗为由，拒绝退回。于是贾某向人民法院提起诉讼，要求刘某返还该画。
问：(1)贾某与刘某订立的合同采取的是什么形式
(2)贾某与刘某的买卖合同效力如何为什么
(3)贾某的诉讼请求，人民法院应否支持为什么

在臂丛神经损伤的临床表现中，以下叙述错误的是

A．臂丛上千损伤多见

B．霍纳综合征为可有可无的体征

C．臂丛完全性损伤运动障碍表现为手、前臂、上臂肌肉全瘫

D．臂丛神经完全性损伤感觉障碍为手、前臂、上臂感觉完全丧失

E．臂丛下部损伤，多因上肢过度上抬外展造成

阅读理解

     New archaeological discoveries suggest that trade between Europe and Asia along the Silk Road

probably began in some form many centuries earlier than once thought. The findings, coupled with a

widening range of scientific and historical research, could add a fascinating new page to the epic of the

Silk Road.

     The latest and most surprising discovery is pieces of silk found in the hair of an Egyptian mummy from

about 1,000 BC, long before regular traffic on the Silk Road and at least one thousand years before silk

was previously thought to be used in Egypt. Other research may extend human activity along this route

back even further, perhaps a million years to the migration of human ancestors into eastern Asia.

     The official origin of EastWest commerce along the road is usually placed in the late 2nd century BC

when an agent of the Chinese Emperor Wudi returned from a dangerous secret mission (使命) across

the western desert into the remote high country of Central Asia. The agent, Zhang Qian, travelled as far

as Afghanistan and brought back knowledge of even more distant lands such as Persia, Syria and a place

known as Lijien, perhaps Rome. Historians have called this one of the most important journeys in ancient

times. His journey opened the way for what have been thought to be the first indirect contacts between

the ancient world's two superpowers, China and Rome. Chinese silk, first traded to central Asian tribes

for war horses and to the Parthians of old Persia in exchange for acrobats and ostrich eggs, was soon

finding its way through a network of merchants to the luxury markets of Rome.

     But the new discoveries show that Chinese silk was apparently present in the West long before the

Han emperor started organized trade over the Silk Road. The research could change thinking about the

early history of world trade and provide insights into the mystery of just how and when Europe and the

Mediterranean lands first became aware of the glorious culture at the other end of Eurasia.

1. The word "coupled" in the first paragraph could best be replaced by ________.

A. produced  

B. continued

C. doubled  

D. combined

2. The silk thread found in the hair of an Egyptian mummy suggests that ________.

A. Egyptians had probably travelled to China to buy silk

B. trade along the Silk Road began earlier than once thought

C. historical research often achieves fascinating results

D. new light can now be thrown on ancient trading practices

3. Until recently most historians believed that trade along the Silk Road ________.

A. originated in the 2nd century BC

B. extended human migration into eastern Asia

C. began a million years ago

D. primarily benefited the Egyptians

4. Historians have always considered Zhang Qian's mission important because they believe ________.

A. he brought back knowledge of Rome to the emperor

B. he discovered the Silk Road

C. he helped establish EastWest trade

D. he travelled as far as Afghanistan

在数据库系统的三级模式体系结构中，描述数据在数据库中的物理结构或存储方式的是 ______。

下列关于投资项目进口设备购置费估算的公式中，正确的是( )。

A．国外运费＝进口设备到岸价×国外运费费率

B．国内运杂费＝进口设备到岸价×人民币外汇牌价X国内运杂费费率

C．进口环节消费税＝(进口设备到岸价×人民币外汇牌价+进口关税)×消费税税率

D．外贸手续费＝进口设备到岸价×人民币外汇牌价×外贸手续费费率