vì trung bình cộng của tuổi anh và tuổi erm cách đều tuổi họ nên tuổi TBC hơn tuổi em 4 tuổi nên tuổi anh hơn tuổi em 4+4=8 tuổi

tìm cặp số x,y với y nhỏ nhất thỏa mãn: x² + 5y² + 2y - 4xy - 3 = 0

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) Over the past 600 years, English has grown from a language of few speakers to become the dominant language of international communication. English as we know it today emerged around 1350, after having incorporated many elements of French that were introduced following the Norman invasion of 1066. Until the 1600s, English was, for the most part, spoken only in England and had not extended even as far as two centuries, English began to spread around the globe as a result of exploration, trade (including slave trade), colonization, and missionary work. Thus, small enclaves of English speakers became established and grew in various parts of the world. As these communities proliferated, English gradually became the primary language of international business, banking and diplomacy.

(2) Currently, about 80 percent of the information stored on computer systems worldwide is English. Two - thirds of the world’s science writing is in English, and English is the main language of technology, advertising, media, international airports, and air traffic controllers - Today there are more than 700 million English users in the world, and over half of these are nonnative speakers, constituting the largest number of nonnative users than any other language in the world.

What is the main topic of this passage?

A. The number of nonnative users of English

B. The French influence on the English Language

C. The expansion of English as an international language

D. The use of English for science and Technology