题目

China news, Beijing, Feb. 9 – Housing price in China has always aroused heated discussions among property developers（房产开发商）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 market, the International Finance News reported. Although the average price of 下面说法正确的是 [　　] A．鼓面每秒振动的次数越多，音调就越高，响度也越大 B．棒击鼓面越重，鼓膜振幅越大，音调越高，响度也越大 C．声源离我们越近，振动幅度越大，响度就越大 D．音色与振动的频率和振幅无关，与发声体的材料有关