A：①②
B：②③
C：③④
D：②④
近年来，我国与机器人相关的企业数量快速增加，但大多数机器人企业规模较小，没有研发能力，企业以组装和代加工为主，主要集中于中低端产产品，核心零件依赖进口，同质化竞争加剧，并已出现“高端产业低端化”的趋势。中国机器人产业的健康发展需要（ ）
①坚持创新发展的原则，增强自主研发能力
②减少政府干预，发挥市场决定资源配置的作用
③政府制定科学规划，支持和引导发展方式的转变
④提高准入门槛，限制民间资本机器人产业
有人把“江湖义气”看作是“够朋友”，认为做事“够朋友”就是友谊，以下理解错误的是 （ ）
阅读下面的短文，从所给的单词中选择合适的单词补全短文，每空只填一词，每词只准用一次，注意书写工整。
fly, flying, buy, take, taking, stay, bought, with, was, favourite, bored, fever
Sam ____ very sad last weekend. He was ill. He had a ____. His mother asked him to ____ in bed. He was very ____. Saturday afternoon, his good friends Tom and Mike came to see him. They ____a lot of fruit and some flowers for Sam. He was very happy.
This weekend, Sam is going to go hiking ____ his friends. They are going to fly kites, ____ pictures and play football. Because Sam likes____ kites. Tom's hobby is ____ pictures. And playing football is Mike's____ sport.
