Biết ∛5 = 1,709975947.....

Viết gần đúng ∛5 theo nguyên tắc làm tròn với hai, ba, bốn chữ số thập phân và ước lượng sai số tuyệt đối.

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 from 36 to 42

  After two decades of growing student enrollments and economic prosperity, business schools in the United States have started to face harder times. Only Harvard's MBA School has shown a substantial increase in enrollment in recent years. Both Princeton and Stanford have seen decreases in their enrollments. Since 1990, the number of people receiving Masters in Business Administration (MBA) degrees, has dropped about 3 percent to 75,000, and the trend of lower enrollment rates is expected to continue.

  There are two factors causing this decrease in students seeking an MBA degree. The first one is that many graduates of four-year colleges are finding that an MBA degree does not guarantee a plush job on Wall Street, or in other financial districts of major American cities. Many of the entry-level management jobs are going to students graduating with Master of Arts degrees in English and the humanities as well as those holding MBA degrees. Students have asked the question, "Is an MBA degree really what I need to be best prepared for getting a good job?" The second major factor has been the cutting of American payrolls and the lower number of entry-level jobs being offered. Business needs are changing, and MBA schools are struggling to meet the new demands.

Which of the following might be the topic of the next paragraph?

A. MBA schools' efforts to change 

B. future economic predictions 

C. a history of the recent economic changes

D. descriptions of non-MBA graduate programs

Read the following passage and mark the letter A, B, C or B on your answer sheet to indicate the correct answer to each of the questions from 30 to 34.

  At the beginning of the nineteenth century, the American educational system was desperately in need of reform. Private schools existed, but only for the very rich. There were very few public schools because of the strong sentiment that children who would grow up to be laborers should not “waste” their time on education but should instead prepare themselves for their life’s work. It was in the face of this public sentiment that educational reformers set about their task. Horace Mann, probably the most famous of the reformers, felt that there was no excuse in a republic for any citizen to be uneducated. As Manager of Education in the state of Massachusetts from 1837 to 1848, he initiated various changes, which were soon matched in other school districts around the country. He extended the school year from five to six months and improved the quality of teachers by instituting teacher education and raising teacher salaries. Although these changes did not bring about a sudden improvement in the educational system, they at least increased public awareness as to the need for a further strengthening of the system.

The word “salaries” is closest in meaning to _________.

A. money

B. wages

C. school fee

D. cost

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

Rowing is the sport or activity of travelling in a boat by using _________.

A. air tanks

B. sails

C. boards

D. oars

Có bao nhiêu phương pháp sau đây được sử dụng để tạo ra số lượng lớn các cá thể có kiểu gen giống nhau?

(1) Nhân giống vô tính bằng nuôi cấy mô tế bào.

(2) Nuôi cấy hạt phấn, sau đó gây lưỡng bội hóa.

(3) Nhân bản vô tính ở động vật.

(4) Cho giao phối cận huyết liên tục nhiều đời.

(5) Sử dụng công nghệ chuyển gen.

A. 2.

B. 3.

C. 1.

D. 4.

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 following questions.

Books which give instructions on how to do things are very popular in the United States today. Thousands of these How-to books are useful. In fact, there are about four thousand books with titles that begin with the words “How to”. One book may tell you how to earn more money. Another may tell you how to save or spend it and another may explain how to give your money away.

Many How-to books give advice on careers. They tell you how to choose a career and how to succeed in it. If you fail, however, you can buy the book — How to Turn Failure into Success”. If you would like to become very rich, you can buy the book “How to Make a Millionaire”. If you never make any money at all, you may need a book called “How to Live on Nothing”.

One of the most popular types of books is one that helps you with personal problems. If you want to have a better love of life, you can read “How to Succeed in Love every Minute of Your Life”. If you are tired of books on happiness, you may prefer books which give step by step instructions on how to redecorate or enlarge a house.

Why have How-to books become so popular? Probably because life has become so complex. Today people have far more free time to use, more choices to make, and more problems to solve. How-to books help people deal with modern life.

It can be inferred from the passage that

A. Today people are more bored with the modern life

B. Modern life is more difficult to deal with

C. Today people have fewer choices to make

D. Today people are more interested in modern life

Cho các phát biểu sau:

 (1) Anken là những chất hữu cơ mạch hở trong phân tử có một liên kết đôi C = C

(2) Anken C₃H₆ có tên thông thường là propen

(3) Etilen và propilen không có đồng phân anken

(4) Anken C₂H₄ có tên thay thế là eten

(5) Olefin là tên gọi khác của ankin

(6) Có 1 anken là chất khí ở điều kiện thường có đồng phân anken

Số phát biểu đúng là.

A. 5   

B. 4    

C. 6    

D. 3

Cho các thí nghiệm sau:

(1) Cho hỗn hợp gồm x mol Cu và x mol Fe₃O₄ vào dung dịch chứa 4x mol H₂SO₄ loãng.

(2) Cho hỗn hợp NaHSO₄ và KHCO₃ (tỉ lệ mol 1 : 1) vào nước dư.

(3) Cho x mol Fe vào dung dịch chứa 2,5x mol AgNO₃.

(4) Cho dung dịch chứa x mol Ba(OH)₂ vào dung dịch chứa x mol NaHCO₃.

(5) Cho Na₂CO₃ dư vào dung dịch chứa BaCl₂.

(6) Cho x mol Fe₃O₄ vào dung dịch chứa 8x mol HCl.

Sau khi các phản ứng kết thúc mà sau thí nghiệm thu được dung dịch chứa 2 muối là

A. 4.

B. 6.

C. 5

D. 3

Tình hình nước ta sau Cách mạng tháng Tám năm 1945 có những thuận lợi và khó khăn gì?