【概括大意】Heavy metals are persistent; they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning. The main idea of this paragraph is__________.

【概括大意】The Second World War is perhaps the most catastrophic (灾难性的) event that mankind has ever suffered. The war affected 80 per cent of the world’s people at that time, from 61 countries, and claimed 55 million lives.The main idea of this paragraph is__________.

【阅读判断】One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up dirt. Eventually you have to clean your mouse.Q: When an ordinary computer mouse gets dirty, it has to be replaced with a new one.

【阅读判断】Technology is a beauty. We eagerly adopt its pleasure, preferring to cope with the drawbacks on the morning after.Q: Technology is like an art, which everybody including scientists loves.

【阅读判断】Norwich, the capital of the part of Britain known as East Anglia, has been in existence for more than two thousand years. It began as a small village beside the River Wensum.Q: The River Wensum flows by Norwich.

【阅读判断】The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms. The heavy rains and high wind caused the power to go out in many homes.Q: Power supply system was not damaged during the storm.

【阅读判断】Back in 1969, US President Richard Nixon confidently predicted: “In the next 50 years, we shall see a woman president, perhaps sooner than you think.” Today, not too far off Nixon’s deadline, America is looking at that possibility. Over the weekend, Hillary Rodham Clinton, wife of former president Bill Clinton, announced her run for 2008 presidency.Q: Up to the present, no woman has been elected president in the US.

【阅读判断】Fermi's genius was known throughout the scientific world. In 1938 he had won a Nobel Prize. Four years later he produced the first nuclear chain reaction, leading us into the nuclear age.Q: Fermi, an experimentalist as well as a theoretician, won a Nobel Prize for producing the first nuclear chain reaction in the world.

【阅读判断】Finally, though a child’s "teachers" may not have been trained in language teaching, their relations with him are always close and personal. They take great pains to make their lessons easy.Q: So far as language teaching is concerned, the teacher’s close personal relationship with the student is more important than the professional language teaching training he has received.

【阅读判断】The river was so high that the water ran into streets and houses. Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks, police cars, and other rescue vehicles to help people who were in trouble.Q: Rescue vehicles had a hard time getting to people.