问题 填空题

图示装置有多种用途,不改变装置放置方向,请回答下列问题:

(1)洗气:除去二氧化碳中的水蒸气,装置内应盛的物质是________ 。

(2)检验:证明CO 中混有CO2,装置内应盛________ 。

(3)贮气:当用排空气法收集H2时,气体应从装置的________ 端通入( 填“A”或“B”下同) ,但用排水法收集氧气时,瓶内先装满水,气体从________ 端通入,当用水将装置中的氧气排出进行实验时,水应从________ 端通入。

(4)若用做量气装置,可以测量气体的体积。瓶内先装满水,气体从________ 端通入,还需要用到的仪器是________ 。该方法适用于测量________ 气体的体积。

(5)医院给病人输氧气,在装置中约放半瓶蒸馏水,连接病人吸的塑胶管的是________ 端。

答案

(1)浓H2SO4

(2)澄清石灰水

(3)B;B;A

(4)B;量筒;不溶于水的

(5)B

阅读理解

Runners in a relay(接力) race pass a stick in one direction. However, merchants passed silk, gold, fruit, and glass along the Silk Road in more than one direction. They earned their living by traveling the famous Silk Road.

The Silk Road was not a simple trading network. It passed through thousands of citied and towns. It started from eastern China, across Central Asia and the Middle East, and ended in the Mediterranean Sea. It was used from about 200 B, C, to about A, D, 1300, when sea travel offered new routes(路线) , It was sometimes called the world’s longest highway. However, the Silk Road was made up of many routes, not one smooth path. They passed through what are now 18 countries. The routes crossed mountains and deserts and had many dangers of hot sun, deep snow and even battles. Only experienced traders could return safe.

The Silk Road got its name from its most prized product. Silk could be used like money to pay taxes or buy goods. But the traders carried more than just silk. Gold, silver, and glass from Europe were much found in the Middle East and Asia. Horses traded from other areas changed farming practices in China. Indian merchants traded salt and other valuable goods. Chinese merchants traded paper, which produced an immediate effect on the West. Apples traveled from central Asia to Rome. The Chinese had learned to graft(嫁接) different trees together to make new kinds of fruit. They passed this science on to others, including the Romans. The Romans used grafting to grow the apple. Trading along the Silk Road led to world-wide business 2,000 years before the World Wide Web.

The people along the Silk Road did not share just goods. They also shared their beliefs. The Silk Road provided pathways for learning, diplomacy(外交), and religion (宗教)

小题1:It’s probable that traders along the Silk Road needed         .

A.to remember the entire trade route

B.to know the making of products

C.to receive certain special training

D.to deal with a lot of difficulties小题2:The Silk Road became less important because         .

A.it was made up of different routes

B.silk trading became less popular

C.sea travel provided easier routes

D.people needed fewer foreign goods小题3:New technologies could travel along the Silk Road because people         .

A.learned from one another

B.shared each other’s beliefs

C.traded goods along the route

D.earned their living by traveling小题4:What is the best title for the passage?

A.The Silk Road ; Past and Present

B.The Silk Road; East Meets West

C.The Silk Road; Routes Full of Dangers

D.The Silk Road; Pathways for Learning

单项选择题