2011年3月11日,震惊全球的日本地震造成福岛核电站毁坏,致使放射性碘泄漏,造也了严重的核污染。这里的碘是指
---I use your ruler, Lingling? --- Sure. Here you are.
--- Do you like watching TV? ---Yes, I. But only after I finish my homework.
Li Yan is my best friend. She comes a small village.
How is your father? Please say hello to ______ for me.
下列关于实验室制氧气并用排水法收集的实验操作先后顺序中不正确的是()