题目

书面表达。 我叫林涛，我有一个梦想，想在2020年有一个叫superman (超人) 的机器人。他可以帮助我做许多事情，还可以和我一起玩。请根据下列图片，写出我的梦想。60词左右。   答案：I'm Lin Tao. I have a dream. I wish I could have a robot in 2020. His name is superman. I hope he can mend the cars and help people carry the heavy boxes. He can play basketball with me. He is good at playing computer games. He can clean my room and go shopping.下列运算中，正确的是（ ）A．5a﹣2a=3 B．（x+2y）2=x2+4y2C．x8÷x4=x2 D．（2a）3=8a3