题目

China news, Beijing, Feb. 9 – Housing price in China has always aroused heated discussions among property developers and ordinary Chinese. To many property developers and local government officials, housing price in China is still low compared with many developed countries. However, the average housing price in the United States is only 8,000 yuan per square meter, while in China, it is even higher than in the United States. This shows that there are some bubbles(泡沫) in Chinese real estate (房地产) market, the International Finance News reported.        Although the average pric我市关心下一代工作委员会为了了解初三学生的视力状况，从全市70000名初三学生中随机抽取了500人进行视力测试，发现其中视力不良的学生有100人，则可估计全市70000名初三学生中视力不良的约有（　　）A．100人B．500人C．14000人D．35000人