【单选题】如何让听众在15分钟之后还能够维持比较高的注意力呢?可以用视频、图片、讲故事和()。
【单选题】企业避开与竞争者直接对抗,将自己的产品定位在与竞争对手不同的位置,发展当前市场上没有的某种特色产品,开拓新的市场,这种市场定位策略为()。
【单选题】Tina _____ have known the truth, or she would have told us.
【单选题】Tina _____ have known the truth, or she would have told us.