【简答题】(6分)写出下列物质的电离方程式: NaHCO 3 , CuSO 4 , (NH 4 ) 2 CO 3 。
【简答题】根据所给情景选择正确答案。 1. 你用英文作自我介绍时应说: [ ] A. This is Peter. B. My name is Peter. C. Nice to see you. 2. 下面哪句话不表示道别? [ ] A. See you tomorrow. B. Bye-bye! C. Nice to see you. 3. 你想称赞女孩很漂亮,应说: [ ] A...
【简答题】英文自我介绍,要求包括姓名、年龄、家乡、爱好。(年龄可以用数字,注意大小写字母) 模板: I'm /My name is... I'm ** I came from... I like (doing)...
【单选题】物质的量浓度相同的下列溶液中: ①NH 4 Cl ②(NH 4 )2CO 3 ③(NH 4 )2SO 4 ④NH 4 HSO 4 ⑤NH 4 HCO3 c(NH 4 + )由大到小的顺序是( )
【简答题】英文自我介绍 常用句型 把下列内容补充完整 My name is ________. I am graduatefrom ________ seniorhigh school and major in ________. There are ________ people in my family. My father works in a computer company. And my mot...
【简答题】请参考模板用英文作自我介绍。(录制视频,美颜要出镜!) Hello, everyone! It’s my honor to introduce myself here. My name is... My friends usually call me...( for short). I’m a boy/ girl of ....(+数字) I was born on ...(+日期) I come...
【单选题】下列各组物质中,两者互为同分异构体的是 ( ) ①CuSO 4 ·3H 2 O和CuSO 4 ·5H 2 O ②NH 4 CNO和CO(NH 2 ) 2 ③C 2 H 5 NO 2 和NH 2 CH 2 COOH ④[Pu(H 2 O) 4 ]Cl 3 和[Pu(H 2 O) 2 Cl 2 ]·2H 2 O·Cl
【单选题】下列转化发生被氧化的是
B.
SO 2 →H 2 SO 4 C CuO→CuSO 4 D NH 3 →NH 4 +