摘要: about 14 million square kilometers around the South Pole, Antarctica is the fifth largest continent in the world. A. Cover B. Covering C. Covered D. To cover

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Children brought up on healthy diets are more intelligent compared with their junk food eating partners, a new research suggests.  

Kids fed a diet packed high in fats, sugars, and processed(加工)  foods had lower IQs than those fed pasta(意大利面食), salads and fruit,  it was found.

The effect is so great that researchers from the University of Bristol said those children with a "healthier" diet may get an IQ improvement.

Scientists stressed good diet was essential in a child's early life as the brain grows at its fastest rate during the first three years of life.

This indicated head growth at this time is linked to intellectual ability and “it is possible that good nutrition(营养) during this period may encourage excellent brain growth” .

Scientists tracked the long term health and happiness of around 14,000 children born in 1991 and 1992 as part of the West Country's Avon Longitudinal(纵向的)Study of Parents and Children ( ALSPAC) .

Parents were questioned about the types and frequency of the food and drink their children consumed when they were three, four, seven and eight and a half years old. According to their different changing form, these children were marked and given grades which ranged from minus two for the most healthy to10 for the most unhealthy.

In the research, IQ was measured of 4,000 children when they were eight and half years old,  using a validated(经过认证的)test-the Wechsler Intelligence Scale(韦氏儿童智力量表) for Children.

The results found after taking account of some influential factors, a leading processed food diet at the age of three was associated with a lower IQ at the age of eight and a half , whether the diet was improved after that age.

Every l point increase in dietary pattern score was associated with a l.67 fall in IQ.

1.Scientists stressed good diet was essential in a child’s early life because        .

A.the brain grows at its fastest rate during the first three years of life.

B.those children with a "healthier" diet must get an IQ improvement.

C.children brought up on healthy diets are less intelligent.

D.these children were given good grades.

2.Which of the following is NOT true?

A.Those children with a "healthier" diet may get an IQ improvement.

B.Good nutrition at any stage may encourage excellent brain growth.

C.Scientists tracked the long term health and happiness of about 14,000 children.

D.Every l point increase in dietary pattern score was associated with a l.67 fall in IQ.

3.The results found if a child ate a leading processed food diet when he was 3, he would          

A.have a higher IQ

B.have a higher IQ as long as he improved his diet

C.have one IQ when he was 8

D.have a lower IQ whether he improved his diet

4.What is the best title of the passage?

A.Food for thought

B.What is healthy food?

C.Healthy diet improves children's intelligence

D.How to become clever?

 

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Aids today

  Aids is caused by a virus called HIV which enters a person’s blood and attacks the body’s immune system.There is no cure for HIV or Aids, and after a person has been infected, he or she will always carry the virus.Sometimes, infected people have no outward symptoms.

  HIV and Aids are spreading across the world at a frightening rate, with about 14,000 people being infected daily.The virus is spread in three ways-through unprotected sex, blood-blood contact and mother-to-child transmission.Unprotected sex is the most common way that the virus is spread, accounting for 75 percent of adult infections worldwide.

  Although many people are familiar with Aids and how it is transmitted, more than a few people hold the view that HIV and Aids are an African problem because the infection rates there are very high.However, HIV and Aids are a problem all over the world.Since the disease was discovered in the 1980s, it has become a serious problem in many places, infecting over 60 million people worldwide.According to the World Health Organization estimates from 2005, more than 4 million children had died from Aids, and more than 14 million children had lost their parents to Aids.All of this makes it clear that something must be done to stop this deadly disease.

  The government is working hard to control the Aids epidemic and has opened labs to test and monitor the disease.In 2003, the government also started providing free drugs for Aids patients in need.

  The United Nations has been very involved in fighting Aids and HIV around the world for many years now.UNAIDS, an organization founded in 1996 helps prevent the spread of Aids.The work includes providing infected people with help from doctors and testing for people.The organization also offers programs that teach Aids prevention to young people and sets up treatment centers.

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