下列各选项中不属于化学反应的是（　　）

—Who's that girl? — She's my____（sister/ brother）.She's a student.

阅读理解

                                                                                      (B)

    Long long ago, there was no paper in the world. People had to write characters(汉字) in bamboo slips or stones.Then there was a man named Cai Lun who was a Chinese man. He made people use all kinds of things to invent paper. From then on, people can use paper to write on. Paper is a great invention. We always remember the great inventor Cai Lun. Nowadays paper is very useful in our work, study and our life. It really means a lot to human beings.

根据短文内容，判断下列句子的正 (A)与误 (B)，并在答题卡的相应位置将其涂黑。