阅读理解。阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。

The first Europeans came to America in 1492 with Christopher Columbus. Since that time people have come to America from all over the world, from Europe, Africa, and Asia, and they have brought their music with them. This mixing of people and music has created American music.

Music is a very important part of our lives. Music is for dancing, drinking, eating, loving, and thinking. Some songs remind us of our childhood or youth.

Others remind of the people they love. Many important occasions, like weddings and funerals have special music. Every nation has a national song like the American “The Star?Spangled Banner”. In the US high schools and colleges have school songs too.

Music is a part of the history of America. It expresses the problems and feelings of its people. As the years pass, the music grows and changes.

Modern science has also changed music. Inventions like records, radios, movies, electric instruments, tape recorders, and videos have changed the way we play and listen to music. They have helped to make music an important form of international communication.

American music, from the earliest folk songs to modern “pop”, is known around the world. Music is one of America's most important exports. It brings the people of the world together. Even when people cannot understand the same language, they can share the same music. Many people learn and practise English by singing song. Understanding American music can help you understand American people, their history and culture.

So, as the song says, “put a dime (10 cents)in the juke box (自动点唱机), baby. Let's listen to the music!”

1.The article mainly tells us about ________.

A.how American music developed

B.when American music developed

C.what American music is

D.why American music is so popular

2.From the text we know that ________.

A.American music has spread all over the world

B.American music began in the 1550s

C.American music is special

D.American music has changed modern science in the US

3.The sixth paragraph probably means that ________.

A.American music is very popular

B.American music is known to people all over the world

C.American music can help us understand American people, history and culture

D.American music is important in our lives

their history and culture.”可知美国音乐帮助我们了解美国人、美国历史和美国文化。

4.American music is ________.

A.for dancing, drinking, eating, loving and thinking

B.a mixture of people and music from all over the world

C.an important form of international communication

D.a part of the history of the world

5.Which of the following statements is true?

A.Only modern American music is world?famous.

B.If people don't understand the same language, they don't understand the same music.

C.Many people learn English by enjoying American songs.

D.If you want to understand American history and culture you must understand American music.

Lead poisoning (铅中毒) occurs when lead is present in high levels in the blood of a person. It is one of the most common medical problems found in children. And it’s important to recognize the presence of lead in children’s bodies because lead is very harmful.

Children have the tendency to go around and put things in their mouths like paint peelings (油漆层剥皮). This is one of the main causes of lead poisoning. It has also been found that children born in poor families have higher chances of getting exposed to lead.

Some of the common symptoms of lead poisoning in children are headaches, stomach pains, hair loss, muscle weakness and weight loss, etc.

Lead poisoning can have severe effects and can lead to heart diseases, kidney diseases and neurological (神经系统的) problems. It can also cause mental dullness and a low IQ level. There have been cases where lead poisoning proved to be terminal for children.

It’s difficult to easily recognize whether a child is affected by lead poisoning, as the symptoms of this disease can occur due to some other medical problems. Therefore, children under the age of six should regularly be checked to know the level of lead in their blood through blood tests. It’s possible to completely cure a child with lead poisoning through treatment. Usually the oral medicine chelator (螯合剂) is given to the children. Sometimes, children are given an injection (注射) for reducing the lead level. Children who have very high level of lead in their blood would need treatment for a long period of time and would also be put on a special diet.

Parents have to take certain precautions to lower the chance of lead poisoning in children. Cleaning the house regularly and removing shoes at the door after coming in from outside will prevent the lead particles from entering the house. Children should be put on a healthy diet, containing high proportions (比例) of calcium and iron, such as eggs, milk, fruits, potatoes, etc, which helps to keep the lead levels in control in the children’s bodies.

In short, it’s a must to be cautious and careful and protect your children from the horrible consequences of lead poisoning.

Lead Poisoning in Children

Ⅰ. 1.

* Children’s going around and 2. in their mouths.

* High chances of blood lead.

Ⅱ. Symptoms

*Headaches, stomach pains, hair loss, muscle weakness, and weight loss, etc.

Ⅲ. 3.

* Leading to heart diseases, kidney diseases and neurological problems.

* 4. in mental dullness and a low IQ level.

Ⅳ. Treatment

* Making children take the chelator or 5. an injection to reduce the lead level.

* Putting children with a very high lead level on 6. .

Ⅴ. Suggestions / Preventions

* Cleaning the house regularly

* 7. shoes at the door after coming in from the outside.

* Letting children eat healthy food rich in 8. .

Ⅵ. 9.

* Being cautious and careful to 10. from lead poisoning.

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