English is one of my s 小题1: at school. I like it very much. I have learned it for three years. It is not easy to learn, but it is very i 小题2: for us.

English is the most widely spoken language in the world. People in different c 小题3:often use English to talk with each other. Our country has opened its door to the world. More a 小题4: more people come here as travelers or on business . So English is getting common in our country. Of course, I must learn it w 小题5:  .

English will be u  小题6: to me after I leave school. If we want to do business with foreigners, we must know English, because most of them speak and write English. In the world, most science b 小题7: are written in English. I am learning English so that I can learn much k 小题8:  _. After I have learned English, I can r   小题9:  short stories in English. I can also sing many English songs. English helps me e 小题10: myself after class.

下列表述不正确的是（）。

A.国内生产总值是一个连续变量

B.2011年全国高校在校学生数是一个离散变量

C.总体和总体单位的关系总是固定不变的

D.粮食平均亩产量是个质量指标