4、已知：如图AB∥CD，CE平分∠ACD，∠A=110°，则∠ECD等于(　　 )

A、110°　　 　B、70°　 　C、55°　 　D、35°

3、下列算式能用平方差公式计算的是(　 　)

　 A. 　　　　　　　　　　　B. 　　　

C. 　　　　　　　　　　　D.

2、计算：的结果是(　　　 )

A、5　　 　　B、6　 　　　C、7　 　　　D、8　　

1、计算正确的是(　　　 )。　

A.　　 B.　 C. 　　D.

84．What is the result of the 2006 Tufts University study?(not more than 11 words)

SECTION C

Directions: Write an English composition according to the instructions given below in Chinese.

你校校长打算改进食堂的设施(facilities)和服务(service)，请你给校长写信，谈谈你的建议。字数在120左右。

83．What causes many college freshmen gain weight according to many nutrition experts and psychologists?(not more than 11 words)

82．What seems to play an important role in students’ social events?(1 word)

81．What makes many college-bound freshman worried?(not more than 8 words)

70．What did the scientists conclude from the second experiment?

A．Destination memory is weaker than source memory.

B．Focusing attention on oneself leads to relatively poor source memory performance.

C．Associating personal experience with information helps people memorize better.

D．Self-focus is responsible for giving information twice or more to the same person.

PART FOUR WRITING

SECTION A

　　 Directions: Read the following passage. Complete the diagram/Fill in the numbered blanks by using the information for the passage. Write NOT MORE THAN 3 WORDS for each answer.

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. 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 result in mental dullness and a low I . Q. 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 6 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 form 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.

SECTION B (10 points)

　　 Directions: Read the following passage. Answer the questions according to the information given in passage and the required words limit. Write your answers on your answer sheet.

　　 Many college-bound freshmen are worrying about more that just who their roommates will be this fall. They may also be nervous about the well-known fact that they are likely to gain weight this school year. While many of us remember the extra weight that showed up right around the start of our college careers, we are not always clear on how much weight we realize gained or why.

Many nutrition experts and psychologists think that it is the change in environment and the stress of a new beginning that cause the typical college freshmen to gain extra ponds. As students start a new stage of their lives, many eat to deal with the stress of change or loneliness. Often, college students are making meals or choosing foods independently for the first time in their lives. If they live in the college dormitory, they have a wide variety of foods to select from that may be higher in calories and fatter that the foods they consumed living at home. In addition college social events usually center around food. I clearly remember sitting in my dorm cafeteria for two or three hours on a Saturday morning socializing with my new trends. Instead of eating only one meal we would start with broadcast, eat throughout the drat on of our socializing, and finish with lunch. Food also makes an appearance after late-night parties, as part of a school day, or simply to break the monotony(单调).

So will this year’s typical freshmen really gain 15 pounds? According to a 2006 Tufts University study, students enrolling in college this will gain weight, but maybe not the assumed 15 pounds. Based on the students surveyed, the study found that men can expect to gain an average of 6 pounds and women an average of 4.5 pounds during the freshman year.

PART FOUR WRITING

Section B

69．The underlined word "undermines" probably means ____.

A．weakens　 　　　　 B．benefits　 　　　　　 C．explains　　 　　　　 D．supports