—Zhang Lili hardly had time to think of herself before she saved her students, ______? —No, she didn't. Her action moved all of us. So she is regarded as 'The Prettiest Woman Teacher'. [ ]
【简答题】Watch the video clip again and fill in the blanks with what you hear. Agent: Of course, you realize this is the worst time of a year to look for work. (1) _____ . Now I’m sure we’ll have something for...
【简答题】A、B、C、D、E、F 是常见单质,其中 A 是用量最大,应用最广泛的金属;元素 D 是地壳中含量最多的金属元素:D 元素和 E 元素在周期表中相邻,G、H、l、J、K、L 是常见化合物,其中 G 在常温下是无色液体,H 是黑色晶体,以上物质相互间的转化关系如图所示: 请回答下列问题: (1)元素 A 在元素周期表中的位置为______(周期)______(族). (2)写出 K 的电子式____...