一瓶标有“555mL”字样的纯净水，水的质量是　 ____　g；小明喝了半瓶水，则剩余半瓶水的密度是　 ____　 kg/m³．

根据短文理解选择答案。

     My name is Mary. I'm eleven. I'm from China. My mum and dad work in a factory. They go to work from Monday to Friday. I have a sister. Her mane is Amy. We look like each other very much and we like to help each other. She and I are middle school students.

     Amy and I are in the same school. I' m a good student in my class. There are forty-two students in my class, twenty boys and twenty-two girls. We have our lessons from eight o'clock in the morning to four o'clock in the afternoon. My English teacher Miss Green, is from England. She is a good teacher. We have five English classes in a week. Now we can say a hundred words and play games in English, We like English and we like our English teacher.

有这样一段动画片：一个小女孩儿偷懒玩游戏，桌上玩偶大小的智能机器人替她写作业。终日抱着手机的女孩没有注意到，每做一次作业，机器人就长大一点，从站在桌上到坐到桌边，直到有一天，真人大小的机器人背起书包去上学，在她诡异的笑容前，女孩变成了玩偶。上述故事（    ）

①是对人工智能的负面效应的能动反思

②启示我们要正确处理娱乐与学习的关系

③如实地反映了当前教育中存在的问题

④警告我们人工智能的智慧最终会超越人类