--Do you have a school trip?

--Yes，_________.

    I'm Peter. There are four people in my family. They are my father, my mother, my grandfather and me. I'm twelve. My birthday is on 15th March. My parents are both doctors. They help people. Their birthdays are both in May. My grandfather is old. He is sixty-five. His birthday is on 9th June. He likes reading. I like reading too. I want to be a teacher in the future. I want to teach Chinese in a school.

在平面直角坐标系中，若点P(x-2，x)在第二象限，则x的取值范围是(     )

历史学名著《全球通史》中说“在中国长达数千年的历史上，有过三次大革命，它们从根本上改变了中国的政治和社会结构。第一次发生在公元前221年，第二次发生在1911年，第三次在1949年，其中第二次革命是指