問題詳情

第48至51顆為顆組     Now one knows who first discovered glass or how it was discovered. Early humans used obsidian, a natural glass formed by volcanoes, to make tools and jewelry. People probably began making glass themselves around 3000 B.C. in Syria. Then, in a war between Egypt and Syria in 1400 B.C.，Syria became part of Egypt. The Egyptians took Syrian glassmakers back to Egypt, and over the centuries the entire eastern Mediterranean area became a glassmaking center     Probably around 300 B.C. the blowpipe was invented. Egyptian glassmakers developed the use of the blowpipe and began forming liquid glass into beautiful shapes. They specialized in jewelry, dishes, bottles, and other containers. Egyptian glass became so famous that in 26 B.C. the Roman Emperor August announced that Egypt had to pay its taxes to Rome with glass.     The Romans started making their own glass. Then they realized that glass could be used to make windows. A few centuries later, Europeans made magnificent church windows from colored glass.     Slowly methods of glassmaking improved, and glassmakers were able to lower prices. Nevertheless, until about 1900 A.D. glass was still made in the traditional ways with very few changes.     Since 1900, companies have developed many new types of glass. Safety glass is sandwich of glass and plastic. If it breaks, the pieces stay together instead of flying in all directions. This invention is very useful in automobile windows. One kind of glass stops most of the heat from the sun. It is widely used in buildings. Another kind of glass is like a mirror on one side. On the other side, it’s like a window.     Today most glass is made by machines in large factories. No one touches it. People use television and computers to control the machines. Nevertheless, a few glassblowers still take pleasure in making glass the traditional way. They make beautiful bottles, containers, and jewelry just as the Egyptians did.
48. What is the article mainly about?
(A) Methods of making glass.
(B)The history of glass.
(C)How ancient peoples learned to make glass.
(D) Types of modern glass.

參考答案

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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