题型:填空题 阅读短文,用适当词填空Hello, everyone! My name 1 Jack Smith. Jack is my 2 name. Smith is my last name.This 3 my father, Tom Smith. He is forty-five years 4 .My mother's 5 isLucy Brown. She is forty-one years old.I love themvery much. 查看答案
题型:问答题 当纸带与运动物体连接时,打点计时器接通频率恒定的电源在纸带上打出一系列点迹.下列关于纸带上点迹的说法中,正确的是 ( )A.点迹越密集,说明物体运动越快B.点迹越密集,说明物体运动越慢C.点迹越密集,说明振针打点越快D.点迹越密集,说明振针打点越慢 查看答案