Unit 4 Amazing Science Welcome to the unit Topic 1 Spaceships are mainly controlled by computers Section C New words doubt 有魔力的 no-doubt 令人吃惊的，令人惊异的 tiny 掌握，精通 n. 主人 cancel 介绍，引进 connect 期望，认为，预料 for instance 宇宙飞船，航天飞机 exchange 微型世界 Teaching aims and demands 1. Master some new words and phrases: doubt, no doubt, tiny, cancel, connect, for instance, spend (in) doing 2. Go on learning the use of object complement: At the same time, they have made the workplace safer and better. The Internet has m
