Bungee jumping is an activity about jumping from a tall structure while connected to a large elastic cord(有弹性的绳子). The tall structure is usually a fixed object, such as a building, bridge or crane; but it is also possible to jump from a movable object, such as a hot-air balloon or helicopter, that has the ability to stay over one place on the ground; fixed-wing aircraft are unsuitable because they only stay high when moving quickly forward.
When the person jumps, the cord stretches to absorb (吸收)the energy of the fall, then the jumper flies upwards again as the cord jumps back. The jumper oscillates(摆动)up and down until all the energy is used up.
The word bungee first appeared around 1930 and was the name for a rubber eraser. The first modern bungee jumps were made on 1 April 1979 from the 250-foot Clifton Suspension Bridge in Bristol, by David Kirk, Chris Baker and Alan Weston of the Dangerous Sports Club. The jumpers continued with jumps in the US from the Golden Gate and Royal Gorge bridges, spreading the concept worldwide. By 1982 they were jumping from mobile cranes and hot-air balloons. Later they put on commercial(商业的)shows, which began in 1986.
As with any sport, injuries can still happen, and there have been deaths. A relatively common mistake in the cases that may cause death is to use a cord that is too long. The cord should be fully shorter than the height of the jumping place to allow it room to jumper either starts to slow down or keeps speeding up depending upon the speed of falling.
【小题1】Which of the following is NOT suitable for bungee jumping?

A．The fixed-wing aircraft	B．The helicopter
C．The hot-air balloon	D．The mobile crane

【小题2】In the second paragraph, the author tells_________________.

A．who suits bungee jumping

B．the principle of bungee jumping

C．the material used for bungee jumping

D．the danger of bungee jumping

【小题3】According to the last paragraph, the safety of the jumpers depends mainly on________.

A．the weight of the jumper

B．the height of the jumping place

C．the length of the cord

D．the speed of the falling

【小题4】The purpose of writing this passage is to__________.

A．teach people how to carry out a bungee jumping

B．remind people of the danger of bungee jumping

C．advise people not to take the risk of bungee jumping

D．introduce some knowledge about bungee jumping

Artificial(假的) flowers are used for scientific as well as for decorative purposes. They are made from a variety of materials, such as wax and glass, so skillfully that they can scarcely be distinguished from natural flowers. In making such models, painstaking and artistry are called for, as well as thorough knowledge of plant structure. The collection of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known throughout the scientific world. In all, there are several thousand models in colored glass, the work of two artist-naturalists, Leopold Blaschka and his son Rudolph.?

The intention was to have the collection represent at least one member of each flower family native to the United States. Although it was never completed. It contains more than seven hundred species representing 164 families of flowering plants, a group of fruits showing the effect of fungus diseases, and thousands of flower parts and magnified details. Every detail of these is accurately reproduced in color and structure. The models are kept in locked cases as they are too valuable and fragile for classroom use.?

Which of the following is the best title for the passage??

A. An Extensive Collection of Glass Flowers ?

B. The Lives of Leopold and Rudolph?

C. Flowers Native to the United States?

D. Material Used for Artificial Flowers?

It can be inferred from the passage that the goal of Leopold and Rudolph was to _______.?

A. create a botanical garden where only exotic flowers grew?

B. do a thorough study of plant structure?

C. make a copy of one member of each United States flower family?

D. show that glass are more realistic than wax flowers?

The underlined word “it” refers to _______.?

A. the intention　 B. the collection　　?

C. one member      D. each flower family?

Silk production has a long and colourful history unknown to most people. Scientific discoveries have shown that silk production existed in China from around 2500 B.C., although it could be much older. For hundreds of years, China kept the secret of silk to itself as one for the most closely protected secrets in history. Anyone revealing the secret of silkworms or trying to take silkworm eggs out of ancient China was punished by death.

At one time silk was reserved only for the Chinese emperor. Gradually, others began wearing silk. In addition to being used for clothing, silk came to have industrial uses in ancient China, something that happened in the West only in modern times. Silk was used to make musical instruments, fishing lines, weapons, ropes and even paper. During the Han Dynasty silk became a form of money. Farmers paid taxes in both rice and silk. The prices of goods were calculated in lengths of silk just as they had once been calculated in gold. The importance of silk is even reflected in the Chinese language. For example, of the 5000 most common Chinese characters, around 500 have silk as their “key”.

In spite of their secrecy, the Chinese eventually lost their monopoly on silk production. It reached Korea in around 200 B.C. when immigrants from China arrived there. Silk production came to India in 300 A.D.. It was not until 500 A.D. that silk production came to Europe when travellers smuggled out silkworms in hollow tubes of bamboo. These were used to establish silk industry in Rome (modern-day Italy), although Chinese silk was still considered to be the best.

Silk was brought to Rome from China by means of the Silk Road. There were actually two Silk Roads, one over land and one on the sea. The land route in particular had a huge effect in history. All sorts of trade goods — silver, gold, jade, porcelain — passed along this road. Ideas travelled the Silk Road too. For example the religion of Buddhism was carried to China from India by traders on the Silk Road. The Silk Road created the first international culture, exposing many people to the ideas and treasures of both Western and Chinese cultures.

1. How was China able to keep the secret of silk production?

A. It refused to sell its silk to other countries.

B. Foreigners were not permitted to enter China.

C. The silkworms needed were not able to survive outside China.

D. Chinese passing on the secret to foreigners were seriously punished.

2. Which of the following uses of silk is NOT mentioned in the passage?

A. A way of purchasing goods people sold.

B. A material used for making different products.

C. A method of paying money to the government.

D. A valuable gift given to foreigners travelling in China.

3.In what order did silk production spread throughout the world according to the passage?

A. Europe à India à Korea à China.                 B. China à Korea à India à Europe.

C. China à India à Korea à Europe.                 D. China à Europe à India à Korea.

4.The underlined phrase “smuggled out” in Paragraph 3 is closest in meaning to ________.

A. quietly traded                                                     B. openly removed

C. illegally transported                                            D. violently stole

5.Which of the following is true about the Silk Road?

A. It allowed for economic and cultural exchanges between countries.

B. It made China the most powerful country in the ancient world.

C. It could only be completed by travellers with access to a boat.

D. It was first developed for transferring religious ideas.

 

Bungee jumping is an activity about jumping from a tall structure while connected to a large elastic cord(有弹性的绳子). The tall structure is usually a fixed object, such as a building, bridge or crane; but it is also possible to jump from a movable object, such as a hot-air balloon or helicopter, that has the ability to stay over one place on the ground; fixed-wing aircraft are unsuitable because they only stay high when moving quickly forward.

When the person jumps, the cord stretches to absorb (吸收)the energy of the fall, then the jumper flies upwards again as the cord jumps back. The jumper oscillates(摆动)up and down until all the energy is used up.

The word bungee first appeared around 1930 and was the name for a rubber eraser. The first modern bungee jumps were made on 1 April 1979 from the 250-foot Clifton Suspension Bridge in Bristol, by David Kirk, Chris Baker and Alan Weston of the Dangerous Sports Club. The jumpers continued with jumps in the US from the Golden Gate and Royal Gorge bridges, spreading the concept worldwide. By 1982 they were jumping from mobile cranes and hot-air balloons. Later they put on commercial(商业的)shows, which began in 1986.

As with any sport, injuries can still happen, and there have been deaths. A relatively common mistake in the cases that may cause death is to use a cord that is too long. The cord should be fully shorter than the height of the jumping place to allow it room to jumper either starts to slow down or keeps speeding up depending upon the speed of falling.

1.Which of the following is NOT suitable for bungee jumping?

A．The fixed-wing aircraft                   B．The helicopter

C．The hot-air balloon                      D．The mobile crane

2.In the second paragraph, the author tells_________________.

A．who suits bungee jumping

B．the principle of bungee jumping

C．the material used for bungee jumping

D．the danger of bungee jumping

3.According to the last paragraph, the safety of the jumpers depends mainly on________.

A．the weight of the jumper

B．the height of the jumping place

C．the length of the cord

D．the speed of the falling

4.The purpose of writing this passage is to__________.

A．teach people how to carry out a bungee jumping

B．remind people of the danger of bungee jumping

C．advise people not to take the risk of bungee jumping

D．introduce some knowledge about bungee jumping

 

Artificial(假的) flowers are used for scientific as well as for decorative purposes. They are made from a variety of materials, such as wax and glass, so skillfully that they can scarcely be distinguished from natural flowers. In making such models, painstaking and artistry are called for, as well as thorough knowledge of plant structure. The collection of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known throughout the scientific world. In all, there are several thousand models in colored glass, the work of two artist-naturalists, Leopold Blaschka and his son Rudolph.?

The intention was to have the collection represent at least one member of each flower family native to the United States. Although it was never completed. It contains more than seven hundred species representing 164 families of flowering plants, a group of fruits showing the effect of fungus diseases, and thousands of flower parts and magnified details. Every detail of these is accurately reproduced in color and structure. The models are kept in locked cases as they are too valuable and fragile for classroom use.?

Which of the following is the best title for the passage??

A. An Extensive Collection of Glass Flowers ?

B. The Lives of Leopold and Rudolph?

C. Flowers Native to the United States?

D. Material Used for Artificial Flowers?

It can be inferred from the passage that the goal of Leopold and Rudolph was to _______.?

A. create a botanical garden where only exotic flowers grew?

B. do a thorough study of plant structure?

C. make a copy of one member of each United States flower family?

D. show that glass are more realistic than wax flowers?

The underlined word “it” refers to _______.?

A. the intention　 B. the collection　　?

C. one member      D. each flower family?