题目

（本小题满分12分）  (理）   在直角坐标平面xOy上的一列点若由轴正方向相同的单位向量，则为T点列。    （I）判断是否为T点列，并说明理由；    （II）若，判断的形状（锐角、直角、钝角三角形），并予以证明：    （III）若          答案：解析: 解（I）         点列      …………4分    （II）在         为钝角三角形      …………8分    （III）                 …………12分阅读短文，完成下列各题。Hello, I'm Lucy. I'm ten. This is my big family. The old man is my grandpa. He is tall. His favourite food is vegetables. The old woman is my grandma. She is short. The tall and thin man is my father. He is a good teacher. He likes bananas very much. The beautiful woman is my mother. Her hair is very long. She likes strawberries and apples. I like strawberries, too. The little boy is my brother. He is under the desk. He likes his toy cars. How many people（人） are there in my family?【1】根据短文内容圈出Lucy一家的照片。（________）A. 　　　　B. 　　　　C. 【2】根据短文内容完成下列表格。grandpaold, tall/grandma1._____________/father2._____________bananas3._____________becutiful, long hair4._____________brother5._____________6._____________7._____________ten years old8._____________