（5分）乙醇是生产生活中常见的有机物，请根据所学知识填空： （1）俗话说 “酒香
题型：填空题
问题：
（5分）乙醇是生产生活中常见的有机物，请根据所学知识填空：
（1）俗话说 “酒香不怕巷子深”说明分子是 ；
（2）50mL水与50mL酒精混合，所得混合物的体积小于100mL，说明分子之间是 ；
（3）下图是工业上在一定条件下制取乙醇的反应微观示意图：（“ ”代表氢原子，
请回答：
a．写出上述反应过程中的化学方程式 ；
b．该反应属于基本反应类型中的 反应。
题型：填空题
New archaeological discoveries suggest that trade between E
urope 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 (史诗) of the Silk Road.
The most surprising discovery is pieces of silk found in the hair of an Egyptian mummy from about 1000 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 East-West trade along the road is usually placed in the late 2nd century BC when an agent of the Chinese Emperor Wu-di returned from a dangerous secret mission（使命）across the 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 Parthian for acrobats and ostrich eggs, was soon finding its way through a network of merchants to the luxury (奢侈品) markets in 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.
小题1:The word “coupled” in the first paragraph could best be replaced by .
A．combined
B．contributed
C．doubled
D．produced小题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．new light can now be thrown on ancient trading pr
actices
C．historical research often achieves fascinating results
D．trade along the Silk Road began earlier than once thought小题3:Until recently historians mostly believed that trade along the Silk Road .
A．began a million years ago
B．primarily benefited the Egyptians
C．originated in the 2nd century BC
D．extended human migration into eastern Asia小题4:Historians have always considered Zhang Qian’s mission important because they believe .
A．he discovered the Silk Road
B．he helped establish East-West trade
C．he travelled as far as Afghanistan
D．he brought back knowledge of Rome to the emperor