【简答题】平面极坐标系有几个单位矢量,是怎么规定的?
【判断题】娱乐新闻的出现,满足了以青少年为主的观众对娱乐资讯的需求。
【简答题】Find the words in the text that mean the same as the following words. 从文章中找出与以下单词意思相同的词: means of transport very year famous rules together worldwide business knowledge income hard produce sell abroad
【简答题】找出课文中与这些单词意思相同的单词。 means of transport
【简答题】请从课文中找到与所给单词意思相近的单词: means of transport