题目内容
听力原文： After the early period of settlements, the first sharp in increase in immigration took place in the 1830's and 1840's. This brought to America flocks of people from northern Europe who lost employment in the Industrial Revolution, and then a great number of Irish people who fled from famine. German political refugees arrived shortly after. Many immigrants from northern and western Europe settled on farms in the middle-west. The Irish became Construction laborers on roads, bridges, and railroads.
In the 1880's, a tremendous flood of immigrants began coming in, this time largely from southern and eastern Europe. To most Americans, these newcomers seemed far stranger than the early settlers. Their languages, customs, and ways of life were very different from those of Americans. The newcomers moved into the poorest neighborhood of the large cities. They tended to stay together and cling to their old ways. As they were accustomed to poverty, they were willing to work for very low wages. This made other workers, especially those in labor unions, afraid that the immigrants with the lower wage level would take away jobs from them. Indeed, organized labor became one of the key opponents of continued immigration.
This opposition finally led to the posting of immigration law in the 1920's, which restricted further immigration. In 1965, these unfair laws were replaced by a new immigration act, which granted equal opportunities to foreigners, regardless of their place of origin. Asians, like Koreans and Vietnamese, soon began to arrive. Many of these newcomers have worked very hard to establish themselves in their new land.
Why did northern European people come to settle down in the United States？
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People were confused in their attempts to control malaria in Europe in the early 1900s, because scientists
Compared to America, the author believe that which of the following factor contribute most
听力原文： America's national symbol, the bald eagle, almost went extinct twenty years ago, but it has made a comeback. In fact, the U. S. Fishing and Wild Life Service are considering the possibility of
taking it off the Endangered Species List. Once, more than fifty hundred pairs of bald eagles nested across the country, but by 1920 that number had fallen below four hundred. The chief killer was the widely used DDT. Fish soaked up DDT, died, and were washed up on shores where bald eagles feasted on them. DDT prevented eagle egg shells from thickening. The shells became so thin that they shattered before the babies hatched. Fortunately in 1.932, a law was paused to ban DDT which saved the bald eagle from total wipeout. And since then wildlife biologists have reintroduced bald eagles from Canada to America. The result was that last year U. S. bird watchers counted eleven thou- sand six hundred and ten bald eagles in the country.
If it were dropped from the Endangered Species List, the bald eagle would still be a threatened species. That means the bird would continue to get the same protection. No hunting allowed, and no disturbing of nests. But bald eagles still face tough times. The destruction of their natural homes could be the next DDT causing eagle numbers to drop quickly.
What was the main harmful effect of the pest's killer DDT on bald eagles？
PART C
Directions: You will hear three dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE.
听力原文： A few months ago, millions of people in London heard alarms all over the town. Emergency services, the Fire Department, the Police, hospitals, and ambulances stood by, ready to go into action. In railway and underground stations, people read notices and maps, which told them where to go and what to do in the emergency. This was Exercise Flood Call, to prepare people for a flood emergency. London wasn't flooded yet, but it is possible that it would be. In 1232 and in 1223, Lon- don was badly flooded. In 1928, people living in Westminster, the heart of London, drowned in floods. And in 1953, one hundred people, living on the eastern edge of the London suburbs were killed again in the floods. At last, Greater London Council took action to prevent this disaster from happening again. Though a flood wall was built in the 1980s, Londoners still must be prepared for the possible disaster. If it happens, 50 underground stations will be underwater. Electricity, gas and phone services will be out of action. Roads will be drowned. It will be impossible to cross any of the bridges between north and south London. Imagine: London will look like the famous Italian city, Venice. But this Exercise Flood Call didn't cause panic among Londoners. Most people knew it was just a warning. One lady said, "It's a flood warning, isn't it？ The water doesn't look high to me."
What happened in London a few months ago？
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