未知题型 患者出示健康码、行程码及48h核酸阴性证明后就可以进入急诊科（）

单项选择题 如果你想仔细地观察蚂蚁，你会借助图中哪种工具（）

未知题型 Charles Dickens lived through the Industrial Revolution. He wrote about how life was changing, especially for rich people.