The machine has been used many years. It’s no...

The machine has been used many years. It’s no wonder that it doesn’t work well________.

A. regularly　　　 　　　　 B. constantly

C. occasionally　　　　 　 　 D. frequently

高三英语单项填空中等难度题查看答案及解析

The machine has been used many years. It’s no wonder that it doesn’t work well________.

A. regularly　　　　 B. constantly　　　 C. occasionally　　　　　 D. frequently

高三英语单项填空中等难度题查看答案及解析

The machine has been used for man years. It’s no wonder that it doesn’t work well __________.

A. regularly　　　　　　　　　　 B. constantly

C. frequently　　 　　　　　 　　 D. occasionally

高三英语单项填空困难题查看答案及解析

—The big clock has been used for many years.

—Well,　　 it doesn’t work well occasionally.

A.that’s because　　　　　 B.it’s no wonder that

C.there’s no doubt if　　 D.it’s unlikely that

高三英语单项填空中等难度题查看答案及解析

The value of the U.S. penny has been dropping for years. Many countries have stopped using pennies. Is it time for the U.S. to do the same?

Those who think we should keep the U.S. penny offer the following arguments to support their positions:

Prices will increase. If we get rid of the penny, everything will have to be rounded to the nickel (五分硬币), costing us more for everything we buy.

Charities need pennies. There are thousands of small charities that depend on pennies to bring in donations. People think nothing of pouring out their old penny jars to support charity, but they won’t part with nickels so easily.

Nickels cost even more to make. If we get rid of the penny, we will need more nickels in circulation. Nickels cost 7.7 cents to make, 2.7 cents over face value, as opposed to 0.26 cents over face value to make a penny. Since the penny costs 0.26 more than face value to make, the Mint (铸币厂) can make 5 pennies and still lose less money than making 1 nickel.

People who want to retire the penny also have some persuasive arguments, including these:

Pennies waste time. The average American wastes 2.4 hours a year handling pennies, or waiting for people who handle them. This statistics is the result of collecting a number of penny-handling related events, including the 30-second period we sometimes spend waiting for someone who just has to dig through their pockets or purse to find that last cent so they can pay for something with exact change (probably so they don’t get stuck with any more pennies).

Making pennies wastes taxpayers’ money. It costs the U.S. Mint 1.26 cents to make each 1 cent coin, meaning that taxpayers are losing 0.26 of a cent for each one of the 7.4 billion pennies the Mint produces each year.

History will repeat itself. In 1857, the Mint stopped making the half-cent coin, partly because the cost of making it was considered to be no longer needed. Yet, commerce continued without any catastrophic effects. History has shown us that updating the monetary supply in countries where the currency (货币) is very stable has had little, if any, negative effect on the economy, or on people’s acceptance of the coinage.

1.According to people who want to keep the penny, getting rid of the penny 　　　　 .

A. is good for ordinary consumers

B. is especially bad for rich people

C. will be convenient for them

D. may lead to fewer donations to small charities

2.Why do pennies waste time?

A. Because consumers don’t always have enough change.

B. Because it takes time for people to get them from their pockets or purse.

C. Because pennies are not easy to take.

D. Because pennies are difficult to collect.

3.The underlined word “catastrophic” in the last paragraph can be replaced by “　　　　 ”.

A. direct　　 B. positive

C. important　　 D. disastrous

4.The text is mainly developed by 　　　　 .

A. giving examples

B. setting down general rules

C. comparing different opinions

D. following the natural time order

高三英语阅读理解中等难度题查看答案及解析

—It has been a wonderful evening．Thank you very much．

—           .

A．I'm glad to hear that                 B．My pleasure

C．No, thanks                           D．Don't say so

高三英语单项填空中等难度题查看答案及解析

For years, the automobile industry has been testing vehicles that use hydrogen as fuel. Now, people across the United States have had a chance to see and even drive cars that get power from hydrogen fuel cells (燃料电池).

But the hydrogen fuel cell is not a new idea. The fuel cell was first invented by Sir William Grove of Britain in 1839. Since then, many different designs, have been invented. There is one place where fuel cells are a proven technology: in space. The American space agency used fuel cells in its Apollo spaceships in the twentieth century.

The most useful fuel cell for transportation purposes is the Polymer Electrolyte Membrane, or P.E.M. fuel cell. It is simple and can operate at temperatures of sixty to eighty degrees Celsius. That is much lower than other fuel cell designs. A P.E.M. fuel cell has two sides divided by a thin membrane (膜). Hydrogen gas is forced through one side where it comes in contact with a reactive material containing the metal platinum(铂). The membrane separates the electrons(电子) from the protons(质子) in the hydrogen atoms. The protons pass through it to the other side of the fuel cell. But the electrons are captured to do work; like powering a motor. Oxygen from the air is forced into the other side of the fuel cell. There, the gas meets the protons that have passed through the membrane. They combine to form water and heat. A single fuel cell does not produce a lot of electricity. But when many fuel cells are combined, they can produce enough electricity to power a vehicle. The product of the chemical reaction that powers fuel cells is water. This makes fuel cells a very clean technology.

Hydrogen fuel cell cars have been slow to develop because of many technical problems that have to be solved. For example, it is unclear how long the membranes in P.E.M. fuel cells will last. Also, fuel cells need water for their chemical reactions. They must be designed to start easily at low temperatures and in dry climates. And smaller, less costly fuel cells must be designed before they can truly take the place of gasoline engines. Now more models of fuel cell vehicles are being tested than ever before. The threat of climate change and the high cost of oil have increased interest in these vehicles that do not cause pollution.

高三英语填空题中等难度题查看答案及解析

For many years， machines have been doing work that people once did， including some dit- ficutt jobs. Search and rescue operations in dangerous environments are often seen as the first areas that will employ high technology robots. But there is another area where they may soon take jobs traditionally held by human beings： the restaurant industry.

Teams from around the world competed in early June at the DARPA Robotic Challenge Finals in California. A team from South Korea and its robot， called DRC-Hubo，won the first place in the competition. The second and third place winners were from the United States. The robots were required to drive a vehicle， climb up steps and do mechanical work. Such ­activities are easy for humans to perform，but more difficult for machines. Not all of the ­competitor were successful. The failures showed how difficult it is to design effective walking

machines.

Akihiro Suzuki works at Yaskawa Electric，a company that develops robots. He says ro­bots cannot do everything a human can，but they are able to work without becoming tired. He says robots cannot taste food，change heating levels or seasonings to get the best flavor (风 味）.But he says if a food can be easily prepared，a robot can repeat the same movement to re­produce the same meal.

One Japanese woman who saw the robots working wanted to bring them home. Masayo Mori says she would like to have a husband who could work like a robot. Suzumo Machinery showed its sushi (寿司）maker robot. It performs the often difficult work of wrapping the popular Japanese food. Hiroshi Monden is an official with the company. He says people all o­ver the world now eat sushi，but there are not enough skilled workers to prepare it. He says his machine can help anyone make sushi.

1.In Paragraph 1，the author tells us 　　　　　　　　 .

A. robots just do difficult jobs

B.robots are sometimes dangerous

C. robots are widely used in our life

D. robots are gradually replacing humans

2.Why did some teams fail at the DARPA Robotic Challenge Finals?

A.Their robots cannot be applied at home.

B. Preparing food is really difficult for robots.

C. Their robots can just repeat the same movement.

D.They failed to design effective walking robots.

3.We can infer from the last paragraph that 　　　　　　　　 .

A. Japanese men are lazy

B. robots are popular in Japan

C. Japan has advanced high technology

D.robots usually take the job of making sushi in Japan

4.In which column can we probably see the text?

A.Education. B. Culture. C. Health. D. Science.

高三英语阅读理解中等难度题查看答案及解析

For many years, machines have been doing work that people once did， including some difficult jobs. Search and rescue operations in dangerous environments are often seen as the first areas that will employ high technology robots. But there is another area where they may soon take jobs traditionally held by human beings： the restaurant industry.

Teams from around the world competed in early June at the DARPA Robotic Challenge Finals in California. A team from South Korea and its robot called DRC-Hubo，won the first place in the competition. The second and third place winners were from the United States. The robots were required to drive a vehicle, climb up steps and do mechanical work. Such ac­tivities are easy for humans to perform，but more difficult for machines. Not all of the com­petitors were successful. The failures showed how difficuit it is to design effective walking machines.

Akihiro Suzuki works at Yaskawa Electric，a company that develops robots. He says ro­bots cannot do everything a human can，but they are able to work without becoming tired. He says robots cannot taste food，change heating levels or seasonings to get the best flavor (风 味）.But he says if a food can be easily prepared，a robot can repeat the same movement to re­produce the same meal.

One Japanese woman who saw the robots working wanted to bring them home. Masayo Mori says she would like to have a husband who could work like a robot. Suzumo Machinery showed its sushi (寿司）maker robot. It performs the often difficult work of wrapping the popular Japanese food. Hiroshi Monden is an official with the company. He says people all o­ver the world now eat sushi，but there are not enough skilled workers to prepare it. He says his machine can help anyone make sushi.

1.In Paragraph 1，the author tells us .

A.robots just do difficult jobs

B.robots are sometimes dangerous

C.robots are widely used in our life

D.robots are gradually replacing humans

2.Why did some teams fail at the DARPA Robotic Challenge Finals?

A.Their robots cannot be applied at home.

B.Preparing food is really difficult for robots.

C.Their robots can just repeat the same movement.

D.They failed to design effective walking robots.

3.We can infer from the last paragraph that .

A.Japanese men are lazy

B.robots are popular in Japan

C.Japan has advanced high technology

D.robots usually take the job of making sushi in Japan

4.In which column can we probably see the text?

A.Education. B. Culture. C. Health. D. Science.

高三英语阅读理解中等难度题查看答案及解析

…I wonder if I could use your cellphone．

…　　　　 _．It is on the desk next to you．

A．No way　　　　　　　 　　　　 B．That's right

C．It’s a pleasure　　　　 D．Be my guest

高三英语单项填空中等难度题查看答案及解析