{#blank#}1{#/blank#} If you are growing tomatoes in your backyard for sale you are producing for the market. You might sell some to your neighbor and some to the local manager of the supermarket. But in either case, you are producing for the market. {#blank#}2{#/blank#} If people stop buying tomatoes, you will stop producing them.

    If you take care of a sick person to earn money, you are producing for the market. If your father is a steel worker or a truck driver or a doctor or a grocer, he is producing goods or service for the market.

    {#blank#}3{#/blank#} You may spend money in stores, supermarkets, gas stations and restaurants. Still you are buying from the market. When the local grocer hires you to drive the delivery truck, he is buying your labor in the labor market.

    {#blank#}4{#/blank#} But for each person or business that is making and selling something, it is very concrete(具体的). If nobody buys your tomatoes, it won't be long before you get the message. {#blank#}5{#/blank#} It is telling you that you are using energies and resources in doing something the market doesn't want you to do.

British Women Writers in different periods of time

The English Renaissance

    The English Renaissance began in the later part of the fifteenth century and lasted until the 1660s. Among the most famous women writers of this period is Aphra Behn, who is seen as the first professional woman writer in English. She wrote a number of plays that dealt with topics such as racism and slavery. A good example is Oroonoko published in 1688. Aphra Behn's works include also the plays The Amourous Prince, The Town Fop, The Dutch Lover and her only tragedy, Abdelazer.

The neoclassical period

    Among the well-known women in Bristish literature during the neoclassical period, from 1660 to the end of the eighteenth century, is Anne Finch. She wrote poetry and tried to express all that she saw and experienced. Two other women are recognized for their contribution to neoclassical British literature: Mary Astell and Lady Mary Wortley Montagu. Mary Astell was a philosopher and a feminist writer. She is best known now for her theories on the education of women.

The Romantic period

    Jane Austen is one of the most famous women writers that worked during the Romantic period (1798-1832). Her works include several novels, most of which focus on marriage as a way for young women to secure social standing and economic security. Her most famous novels are Pride and Prejudice, Sense and Sensibility and Emma. Another famous woman writer from the English Romanticism is Mary Shelley. She is the author of Frankenstein, History of Six Weeks Tour and The Last Man.

The Victorian period

    The Victorian period, between the 1830s and 1900, was the time when the Bronte sisters, George Eliot and Elizabeth Gaskell lived and wrote. Charlotte Bronte, Emily Bronte and Anne Bronte produced many British literary classics. Charlotte's novels include Jane Eyre, Shirley, Villette and The Professor. Mary Anne Evans adopted the male pen name George as she wanted to set herself apart from the feminine genre of cookbooks and domestic moral tales. Her most famous novel is The Mill on the Floss published in 1860.

    When the dog named Judy spotted the first sheep in her life, she did what comes naturally. The four-year-old dog set off racing after the sheep across several fields and, being a city animal, lost both her sheep and her sense of direction. Then she ran along the edge of cliff( 悬崖) and fell 100 feet, bouncing off a rock into the sea.

    Her owner Mike Holden panicked and celled the coastguard of Cornwall, who turned up in seconds. Six volunteers slid down the cliff with the help of a rope but gave up all hope of finding her alive after a 90-minute search.

    Three days later, a hurricane hit the coast near Cornwall. Mr. Holden returned home from his holiday upset and convinced his pet was dead. He comforted himself with the thought she had died in the most beautiful part of the country.

    For the next two weeks, the Holdens were heartbroken. Then, one day, the phone rang and Steve Tregear, the coastguard of Cornwall, asked Holder if he would like his dog bark.

    A birdwatcher, armed with a telescope, found the pet sitting desperately on a rock. While he sounded the alarm, a student from Leeds climbed down the cliff to collect Judy.

    The dog had initially been knocked unconscious(失去知觉的)but had survived by drinking water from a fresh scream at the base of the cliff. She may have fed on the body of a sheep which had also fallen over the edge. “The dog was very thin and hungry,” Steve Tregear said, “It was a very dog. She survived because of a plentiful supply of fresh water,” he added.

    It was, as Mr. Holden admitted, “a minor miracle(奇迹)”.

    Early people lived by hunting animals and gathering grains. After a tribe(部落） had lived in an area for some time, its food supply would begin to reduce. Then the tribe had to move to new hunting grounds where there was more food.

    This way of life caused special problems for the tribes. They were forced to depend on luck, as well as on their hunting skills. If they could find no game, the whole tribe was in danger of starving. And when the hunters had good luck one day, they were not sure to find game the next time. The tribes moves often because much land was needed to support their people.

    Finally, people learned that they could grow their food. At first, the women of tribes raised patches of wild grain. Later, people discovered that they could plant their own seeds. Farming slowly became a way of life.

    As people turned away from hunting to farming, their life changed. When the food supply became more constant, they no longer moved from place to place. The success of their crops depended partly on the weather, but there were also things they could do to help crops grow.

    In the past, a tribe had to travel many miles for food. Now , only a small amount of land was necessary to feed the whole tribe. The tribe could grow in size because farming provided a way to feed people.

Something Fun

    A person is on trial for murder in a court room in Oklahoma. There is strong evidence indicating that he is guilty（有罪的）. However, the body is not found.

    In the defense's (辩护方) closing speech, the lawyer, knowing that his client (委托人) is guilty and that it looks like he'll probably be seriously punished, decided to play a clever trick.

    "Ladies and gentlemen of the jury (陪审团), I have a surprise for you all," the lawyer says as he looks at his watch. "Within one minute, the person assumed dead in this case will walk into this court room," he says and he looks towards the court-room door. The jury, somewhat surprised, looks at the door eagerly. A minute passes. Nothing happens.

    Finally the lawyer says, "Actually, I made up the previous statement. But you all waited with expectation. I, therefore, put it to you that there is a reasonable doubt in this case as to whether anyone was killed and insist that you pass a judgment of not guilty."

    The jury, clearly confused, back off to discuss.

    A very few minutes later, the jury returned and one of them pronounces a verdict (裁决) of guilty.

    "But how?" asks the lawyer in surprise  "You must have had some doubt; I saw all of you stare at the door."

    Answers the jury member, "Oh, we did look. But your client didn't."

A seismic (地震的；重大的) shift in climate science might be heating up.

New research shows that sound waves, produced by earthquakes can be used to measure temperatures in the ocean which traps 90% of the heat Earth absorbs from the sun，making long-term changes in ocean warmth, a major factor in how the world might respond to global warming.

For years the main approach of measuring ocean temperature has been Argo, an array (阵列) of 4000 automatic floats, which drifts the globe, sampling ocean water and measuring its temperature. Yet Argo measurements stop at 2000 meters.

The new technique called "Seismic Ocean Thermometry", would be especially useful in detecting long-term changes in ocean temperatures deeper than Argo's reach.

"Ocean Acoustic Tomography", the basis for the current research, was first tested nearly 30 years ago. The initial studies created sound waves artificially, basically increasing the volume on giant underwater speakers. Scientists measured the sound's travel time from the speakers to receivers thousands of kilometers away. Because ocean temperatures affect the speed of the waves, the researchers could calculate average temperatures along their paths. But some believed the noise was a threat to ocean life and the technique never took off.

The new study instead uses a natural sound source for investigation: earthquakes making a low, continuous noise beneath the seafloor off the coast of Sumatra that drum up sound waves in the ocean. On the shores of the Chagos Islands in the East Indian Ocean, between 2005 and 2016 Seismic Station Diego Garcia recorded seismic waves produced by those earthquakes. Some of those waves created physical changes in land and sea as they traveled. Others were sound waves or T waves that moved through the deep ocean, delivering valuable data about ocean temperature.

12 years of data coupled with mathematical models pointed to a temperature change of roughly 0.044 degrees per decade, a trend larger than those predicted by Argo. The findings suggest that Seismic Ocean Thermometry is a feasible method to measure changes in ocean temperature. Further data from other regions of the globe and other timeframes would help improve the warning models and predictions.

And in future studies the researchers plan to listen directly for sound waves, using a network of hydrophones, microphones which detect sound waves under water. Sound waves set the tone for a deep dive into our warming oceans even if they fail to reach 60000 miles under the sea?