Because of the Russian gas limit to Europe, a...

Because of the Russian gas limit to Europe, attempts _______ to use botanical fuel as a source of power.

高三英语单项填空简单题查看答案及解析

In the late 1950s, a Russian geneticist called Dmitry K. Belyaev attempted to create a tame (驯化的) fox population. Through the work of a breeding programme at the Institute of Cytology and Genetics at Novosibirsk, in Russia, he sought to find the evolutionary pathway of tame animals. His test subjects were silver-black foxes, a melanistic (带黑色的) version of the red fox that had been bred in farms for the color of their fur.

He selected the animals based on how they responded when their cage was opened. About 10% of the foxes displayed a weak “wild-response”, meaning they were docile around humans. Those that hid in the corner or made aggressive voices were left in the farm. Of those friendly foxes, 100 females and 30 males were chosen as the first generations of parents.

When the young foxes were born, the researchers hand-fed them. They also attempted to touch or pet the foxes when they were two to two-and-a-half months old, for strictly measured periods at a time. If the young foxes continued to show aggressive response, even after significant human contact, they were thrown away from the population—meaning they were made into fur coats. In each selection, less than 10% of tame individuals were used as parents of the next generation.

By the fourth generation, the scientists started to see dramatic changes. The young foxes were beginning to behave more like dogs. They wagged their tails and “eagerly” sought contact with humans. By 2005-2006, almost all the foxes were playful, friendly and behaving like domestic dogs. The foxes could “read” human hints and respond correctly to gestures or glances.

1.What do we know about Belyaev’s breeding plan?

A. It explains how red foxes were bred.

B. It focuses on how tame animals evolved.

C. It explains why pet foxes became popular.

D. It concentrates on why tame animals disappeared.

2.How did he choose his test foxes in the experiment?

A. By appearance.

B. By color.

C. By reaction.

D. By flexibility.

3.What can be inferred from Paragraph 3?

A. Smart foxes were used for testing.

B. The purpose of selection was unclear.

C. Friendly foxes were kept on testing.

D. The selection was not exact and thorough.

4.What is the distinguishing characteristic of the fourth generation foxes?

A. Behaving in a friendlier way.

B. Eating plants.

C. Having drooping ears.

D. Having shortened legs.

高三英语阅读理解困难题查看答案及解析

To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.

A. can       B. would       C. might       D. should

高三英语单项填空中等难度题查看答案及解析

Was it because of the heavy snowstorm in Europe ________ the flight had to be put off?

高三英语其他题中等难度题查看答案及解析

Was it because of the heavy snowstorm in Europe _______ the flight had to be put off ?

A. which       B．so       C．why      D．that

高三英语单项填空中等难度题查看答案及解析

Was it because of the heavy snowstorm in Europe ________the flight had to be put off?

A．which    B．so   C．why  D．that

高三英语单项填空困难题查看答案及解析

Russian police have started a new attempt to get drivers to slow down at zebra crossings by having painted horses as zebras walk across on the busiest streets in some of the big cities in an attempt to improve road safety and raise awareness among Russia’s notoriously (臭名昭著地) careless drivers.

The light grey horses, painted with black stripes, carried signs on their backs reading: “Careful, children are on their way to school.” The police sent the “zebras” to several different locations in the Russian capital, where officials in orange vests walked them over zebra crossings and handed out leaflets (传单) to passing drivers.

Some held up rainbow-coloured umbrellas over the painted animals to protect them from the rain. Russian roads are notoriously dangerous and drivers still rarely take the initiative (主动采取措施) to avoid pedestrians. Nearly half of all traffic accidents in the country’s big cities are caused by cars hitting pedestrians, and a third of those occur on crossings, according to traffic police figures published last month.

In the first six months of this year, 378 people were killed and more than 6, 600 injured on pedestrian crossings in Russia, according to police. In Moscow alone, 43 people were killed, including two children.

Though police officials said that only safe paint would be used on the animals, animal rights activists still disagreed with the idea, accusing the police of “treating animals like garbage”.

“Children understand that paints are bad for animals,” the Interfax news agency quoted president of Vita animal rights group Irina Novozhilova as saying.

Let’s hope this part of the campaign is over and animals are left out of future attempts to raise pedestrians’ awareness.

1.Why do Moscow police have “zebras” walk across on the busiest streets?

A. To make a call on protecting animals.

B. To remind people zebras are in danger of extinction.

C. To tell people it is dangerous to cross streets.

D. To raise drivers’ awareness of road safety.

2.What does the underlined word “them” in paragraph 2 refer to?

A. The zebras. B. The horses.

C. The policemen. D. The drivers.

3.From the text we can learn that ________.

A. most Russian drivers have realized the seriousness of the problem

B. Russian drivers often ignore traffic lights

C. Russian drivers seldom give way to pedestrians

D. the driving skills of Russian drivers are bad

4.What do animal rights activists think of the new attempt?

A. Drivers must slow down at pedestrian crossings.

B. These animals are ill-treated by the police.

C. The paints used on the horses are safe.

D. Road safety should be improved.

5.Which word can best describe the author’s attitude towards the campaign?

A. Critical. B. Reserved.

C. Doubtful. D. Positive.

高三英语阅读理解中等难度题查看答案及解析

He turned down the request of his friend because it was________ the limit of his power.

A．beyond                              B．over                          C．off                              D．above

高三英语单项填空简单题查看答案及解析

The car is environmentally friendly because it uses electricity instead of gas. _____, it is less expensive.

A. Besides    B. However  C. Instead  D. Therefore

高三英语单项填空中等难度题查看答案及解析

—You didn’t go to Europe, why?

—I _____ this morning, but I _____ to Shanghai because of an emergency ．

A．was to start; am going                    B．was scheduled to start; will go

C．should have started; am going              D．would like to start; will go

高三英语单项填空中等难度题查看答案及解析