判断题
显示与隐藏参考线快捷键是Ctrl+H()
正确(↓↓↓ 点击‘点击查看答案’看答案解析 ↓↓↓)
问答题 采用该战略有可能面临哪些障碍？如何解决？
单项选择题 From this passage we can learn that（）.
单项选择题 By saying "However，for all this，the current e-book readers are unlikely to make it big"，the author implies （）.
