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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 retur ned 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 fin ding 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
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【单选题】良好的氛围有助力于访问的成功,下列哪项不是氛围营造方面的内容( )
A.
要与被访者进行良好的沟通,取得被访者的积极配合
B.
用声音、眼神、态度积极的心态与被访者沟通
C.
要控制访问节奏,做到快慢有序
D.
送适当的礼品
E.
提问后,要给被访者适当的思考时间,不要催促
【判断题】在电气化区段通过或使用各种车辆、机具设备不得超过机车车辆限界。
A.
正确
B.
错误
【判断题】在电气化区段通过或使用各种车辆、机具设备不得低于机车车辆限界,所有作业人员和工具与接触网必须保持2m以上的距离。
A.
正确
B.
错误
【简答题】如题图所示电路为一电调衰减器。其中,二极管2AP12与电阻R构成分压电路,2AP12的伏安特性如题图(a)所示,R=300Ω,C 0 为隔直流电容,RFC为高频扼流圈。设输入信号v i (t)幅度很小,求V P =0.3、0.4、0.5、0.6、0.7(V)时电路的传输系数A v =v o /v i 。
【单选题】在电气化区段通过或使用各种车辆、机具设备不得超过()限界。
A.
线路
B.
建筑物
C.
机车车辆
D.
安全距离
【简答题】如题图所示电路为实用的二阶移相电路,求转移电压 。
【单选题】在电气化区段通过或使用各种车辆、机具设备不得超过机车车辆限界,所有()与接触网必须保持2m以上的距离。
A.
作业人员和工具
B.
作业人员
C.
机具
D.
物件
【判断题】在电气化区段通过或使用各种车辆、机具设备不得超过机车车辆限界,所有作业人员和工具与接触网必须保持2m以上的距离。
A.
正确
B.
错误
【单选题】在电气化区段通过或使用各种车辆、机具设备不得()机车车辆限界,所有作业人员和工具与接触网必须保持()m以上的距离。
A.
超过,2
B.
超过,3
C.
超过,4
D.
超过,5
【单选题】在电气化区段通过或使用各种车辆、机具设备不得超过( )限界。
A.
机车车辆
B.
建筑限界
C.
保护区限界
D.
区段限界
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