Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

(1) As the twentieth century began, the importance of formal education in the United States increased. The frontier had mostly disappeared and by 1910 most Americans lived in towns and cities. Industrialization and the bureaucratization of economic life combined with a new emphasis upon credentials and expertise to make schooling increasingly important for economic and social mobility. Increasingly, too, schools were viewed as the most important means of integrating immigrants into American society.

(2) The arrival of a great wave of southern and eastern European immigrants at the turn of the century coincided with and contributed to an enormous expansion of formal schooling. By 1920 schooling to age fourteen or beyond was compulsory in most states, and the school year was greatly lengthened. Kindergartens, vacation schools, extracurricular activities, and vocational education and counseling extended the influence of public schools over the lives of students, many of whom in the larger industrial cities were the children of immigrants. Classes for adult immigrants were sponsored by public schools, corporations, unions, churches, settlement houses, and other agencies.

(3) Reformers early in the twentieth century suggested that education programs should suit the needs of specific populations. Immigrant women were once such population. Schools tried to educate young women so they could occupy productive places in the urban industrial economy, and one place many educators considered appropriate for women was the home.

(4) Although looking after the house and family was familiar to immigrant women, American education gave homemaking a new definition. In preindustrial economies, homemaking had meant the production as well as the consumption of goods, and it commonly included income-producing activities both inside and outside the home, in the highly industrialized early-twentieth-century United States, however, overproduction rather than scarcity was becoming a problem. Thus, the ideal American homemaker was viewed as a consumer rather than a producer. Schools trained women to be consumer homemakers cooking, shopping, decorating, and caring for children "efficiently" in their own homes, or if economic necessity demanded, as employees in the homes of others. Subsequent reforms have made these notions seem quite out-of-date. 

Which paragraph mentions the importance of abilities and experience in formal schooling?

A. Paragraph 2 

B. Paragraph 4 

C. Paragraph 1

D. Paragraph 3

1;a;do SA=SB=SC=SD=> tam giác SAC và SDB cân tại SO vuông góc với AC và BD => SO vuông góc với (ABCD)
do ABCD là hình chữ nhật => tính đc Ac=> tính đc AO
góc giữa SA và (ABCD) là góc SAO
dựa vào hệ thức lượng là ra
b.d(AB;SC)=d(ab;(SDC))
do AB// CD=d(ab;(SDC))=d(B;(SDC))
từ B kẻ BK vuông góc với SD khoảng cách chính là đoạn BK
áp dụng hệ thức lượng là ra!

Số chẵn liền trước của số 176 là:

A. 174

B. 175

C. 164

D. 178

Xác định tính đúng sai của mỗi khẳng định sau:

a) Hai tia có một điểm gốc chung và một điểm chung khác gốc là hai tia trùng nhau.

b) Hai tia chung gốc thì đốinhau.

c) Điểm M  thuộc tia AB thì M nằm giữa A và B.

d) Hai tia Ox, Oy đối nhau. Điểm A thuộc tia Ox, điểm B thuộc tia Oy thì O nằm giữa A và B.

Read the following passage and mark the letters A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.

Scientists do not yet thoroughly understand just how the body of an individual becomes sensitive to a substance that is harmless or even wholesome for the average person. Milk, wheat, and egg, for example, rank among the most healthful and widely used foods. Yet these foods can cause persons sensitive to them to suffer greatly. At first, the body of the individual is not harmed by coming into contact with the substance. After a varying interval of time, usually longer than a few weeks, the body becomes sensitive to it, and an allergy has begun to develop. Sometimes it's hard to figure out if you have a food allergy, since it can show up so many different ways. Your symptoms could be caused by many other problems. You may have rashes, hives, joint pains mimicking arthritis, headaches, irritability, or depression. The most common food allergies are to milk, eggs, seafood, wheat, nuts, seeds, chocolate, oranges, and tomatoes. Many of these allergies will not develop if these foods are not fed to an infant until her or his intestines mature at around seven months. Breast milk also tends to be protective. Migraines can be set off by foods containing tyramine, phenathylamine, monosodium glutamate, or sodium nitrate. Common foods which contain these are chocolate, aged cheeses, sour cream, red wine, pickled herring, chicken livers, avocados, ripe bananas, cured meats, many Oriental and prepared foods (read the labels!). Some people have been successful in treating their migraines with supplements of B-vitamins, particularly B6 and niacin. Children who are hyperactive may benefit from eliminating food additives, especially colorings, and foods high in salicylates from their diets. A few of these are almonds, green peppers, peaches, tea, grapes. This is the diet made popular by Benjamin Feingold, who has written the book “Why your Child is Hyperactive”. Other researchers have had mixed results when testing whether the diet is effective.

The author states that the reason that infants need to avoid certain foods related to allergies has to do with the infant's ___________.

A. lack of teeth

B. poor metabolism

C. inability to swallow solid foods

D. underdeveloped intestinal tract

Cho đoạn thẳng AB = 4cm. Trên tia AB, lấy điểm C sao cho AC = 10cm.

a) Chứng tỏ rằng điểm B nằm giữa hai điểm A và C.

b) So sánh độ dài hai đoạn thẳng AB và BC.

c) Trên tia BA, lấy điểm D sao cho BD = 10cm. Tính độ dài đoạn thẳng AD.

d) Chứng minh rằng điểm A nằm giữa hai điểm C và D.