Địa Lí 4 Bài 21 trang 128:

- Quan sát hình 1, em hãy cho biết:

+ Chỉ vị trí của Thành phố Hồ Chí Minh trên lược đồ và cho biết thành phố giáp những tỉnh nào?

+ Cho biết từ Thành phố Hồ Chí Minh có thể đi tới các tỉnh khác bằng các loại hình giao thông vận tải nào?

- Dựa vào bảng số liệu sau, em hãy so sánh về diện tích và số dân cuat Thành phố Hồ Chí Minh với các thành phố khác

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.

After inventing dynamite, Swedish-born Alfred Nobel became a very rich man. However, he foresaw its universally destructive powers too late. Nobel preferred not to be remembered as the inventor of dynamite, so in 1895, just two weeks before his death·, he created a fund to be used for awarding prizes to people who had made worthwhile contributions to humanity. Originally there were five awards: literature, physics, chemistry, medicine, and peace. Economics was added in 1968, just sixty-seven years after the first awards ceremony.

          Nobel's original legacy of nine million dollars was invested, and the interest on this sum is used for the awards which vary from 30,000 to 125,000.

          Every year on December 10, the anniversary of Nobel's death, the awards (gold medal, illuminated diploma, and money) are presented to the winners. Sometimes politics plays an important role in the judges' decisions. Americans have won numerous science awards, but relatively few literature prizes.

No awards were presented from 1940 to 1942 at the beginning of World War II. Some people have won two prizes, but this is rare; others have shared their prizes.

What is the main idea of this passage?         

A. Alfred Nobel created awards in six categories for contributions to humanity. 

B. Alfred Nobel left all of his money to science.

C. Alfred Nobel became very rich when he invented dynamite   

D. Alfred Nobel made a lasting contribution to humanity

\(\frac{a}{b}=\frac{c}{d}\Rightarrow ad=bc\Rightarrow\frac{a}{c}=\frac{b}{d}\)

\(\Rightarrow\frac{a^3}{c^3}=\frac{b^3}{d^3}=\frac{a^2b}{c^2d}=\frac{2b^3}{2d^3}=\frac{a^3+2b^3}{c^3+2d^3}\)

=>đpcm