题目

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。Huawei Technologies Co said 【1】 Thursday that its in-house operating system HarmonyOS will be used in smartphones next year, marking a breakthrough in Chinese companies' efforts to commercialize （商业化）self-developed operating systems and to build 【2】 （ they） own globally competitive software ecosystems.HarmonyOS 【3】（ use） in smartwatches, personal computers and other internet of things devices （装置）later. As we saw during the event, HarmonyOS 2. 0 enables meetings i5．新疆被誉为“瓜果之乡”，长江三角洲是著名的“鱼米之乡”，形成这种区域差异的主要因素是（　　）A．地形B．科技C．气候D．交通