阅读下面短文，然后根据短文内容简要回答下列问题Most people drink tea in the world. But tea does not mean the same thing to different people. In different countries, people have
In the late nineteenth century, 5,000 pianos were sold in the United States each year and, with over half a million youths learning to play the instrument, there was a huge demand for sheet music （
，使得
．”的否定是___________________．
