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

Until recently, most American entrepreneurs were men. Discrimination against women in business, the demands of caring for families, and lack of business training had kept the number of women entrepreneurs small. Now, however, businesses owned by women account for more than $40 billion in annual revenues, and this figure is likely to continue rising throughout the 1990s. As Carolyn Donnell Gray, an official of the Small Business Administration, has noted, “The 1970s was the decade of women entering management, and the 1980s turned out to be the decade of the woman entrepreneur”. What are some of the factors behind this trend? For one thing, as more women earn advanced degrees in business and enter the corporate world, they are finding obstacles. Women are still excluded from most executive suites. Charlotte Taylor, a management consultant, had noted, “In the 1970s women believed if they got an MBA and worked hard they could become chairman of the board. Now they’ve found out that isn’t going to happen, so they go out on their own”. In the past, most women entrepreneurs worked in “women’s” fields: cosmetics and clothing, for example. But this is changing. Consider ASK Computer Systems, a $22-million-year computer software business. It was founded in 1973 by Sandra Kurtzig, who was then a housewife with degrees in math and engineering. When Kurtzig founded the business, her first product was software that let weekly newspapers keep tabs on their newspaper carriers-and her office was a bedroom at home, with a shoebox under the bed to hold the 6 company’s cash. After she succeeded with the newspaper software system, she hired several bright computerscience graduates to develop additional programs. When these were marketed and sold, ASK began to grow. It now has 200 employees, and Sandra Kurtzig owns $66.9 million of stock.

Of course, many women who start their own businesses fail, just as men often do. They still face hurdles in the business world, especially problems in raising money; the banking and finance world is still dominated by men, and old attitudes die hard. Most businesses owned by women are still quite small. But the situation is changing; there are likely to be many more Sandra Kurtzig in the years ahead.

The word “that” in the first paragraph refers to _______

A. a woman becomes chairman of the board

B. women working hard 

C. women achieving advanced degrees 

D. women believing that business is a place for them

Read the following passage and mark the letter 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 people sensitive to them to suffer greatly. At first, the body in treating their migraines with supplements of B- vitamins, particularly B6 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, lea, 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 word “these” in the third paragraph refers to _________.

A. food additives

B. food colorings

C. innutritious foods

D. foods high in salicylates

Nghề điện dân dụng có triển vọng phát triển như thế nào?

Quan sát hình 25 và tìm hiểu 2 ví dụ dưới đây. Từ những quan sát được và từ các tư liệu trên, hãy trả lời các câu hỏi sau:

- Sự biểu hiện ra ngoài kiểu hình của một một kiểu gen phụ thuộc vào những yếu tố nào? Trong các yếu tố ấy, yếu tố nào được xem như là không biến đổi?

- Thường biến là gì?

Sự hình thành thể đa bội do nguyên phân và giảm phân không bình thường diễn ra như thế nào?

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each the following questions.

The death rate would decrease if hygienic conditions_______improved.

A. are

B. have been

C. were

D. had been

Khí nitơ và khí oxi là hai thành phần chính của không khí. Trong kĩ thuật người ta có thể hạ thấp nhiệt độ để hóa lỏng không khí. Biết nitơ lỏng sôi ở -196oC oxi lỏng sôi ở -183oC. Làm thế nào để tách riêng được khí nitơ và oxi.

Cho một lượng hỗn hợp X gồm Ba và Na vào 200 ml dung dịch Y gồm HCl 0,1M và CuCl₂ 0,04M. Kết thúc các phản ứng, thu được 0,448 lít khí (đktc) và m gam kết tủa. Giá trị của m là 

A. 3,92 

B. 0,98

C. 0,784

D. 1,96

Hình bên mô tả 2 dạng hệ tuần hoàn ở động vật, cho biết phát biểu nào dưới đây là đúng?

A. Hình A là dạng hệ tuần hoàn kín, hình B là dạng hệ tuần hoàn hở. 

B. Động vật đơn bào trao đổi chất theo dạng hệ tuần hoàn A. 

C. Ở dạng hệ tuần hoàn A, máu chảy trong động mạch dưới áp lực trung bình, với tốc độ tương đối nhanh. 

D. Các động vật có hệ tuần hoàn dạng B, tế bào trao đổi chất với máu qua thành mao mạch.