Question

　　In 1995 ten of the largest cities in the world have a total population of 152．5 million． How does it spread out ? How does it distribute? Let's have a look at the circle below． We divide the ten cities into five groups : Group A : Tokyo in Japan and Seoul in Korea． Group B: Sao Paulo in Brazil and Mexico City in Mexico． Group C: New York and Los Angeles in the U．S．A． Group D: Bombay and Calcutta in India． Group E: Shanghai and Beijing in China． If l52．5 million is supposed to be 100% in 360° circle, then each group’s population takes a certain percent of the 152．5 million in total, a certain part of the circle, a certain number of degrees in a central angle in the 360 ° circle．

1．What was the total population in Shanghai and Beijing in 1995?

A．24． 7 million．　　 B． 25．7 million．　　 C． 26．7 million．　　 D． 27．7 million

2．What was the total population in Sao Paulo and Mexico City in 1995?

A．31 million．　　 B． 32 million．　　 C． 33 million．　　　　D． 34 million．

3．How many more million of people were there in Group A than in Group C?

A．6．15 million．　　B． 7．25 million．　　 C． 8．15 million．　　 D． 9．15 million．

4．How many degrees are there in the central angle of the part for the total population of Bombay and Calcutta?

A．64．8° ．B． 74．8° ． C． 44．8° ． D． 54．8° ．

5．What is the ratio (比例) of the total population of New York and Los Angeles to the total population of Tokyo and Seoul?

A．1/5 B．2/5　　 C．3/5　　 D． 4/5

Answer 1

答案：C;B;D;A;D
提示：

话题：有关世界各大城市人口的圆形图表识别。重点：细节捕捉、准确计算。