下列各组物质中,带点的同种元素的化合价相同的是 A.Cl2、NaCl B.NH3 发布时间:2017-07-13 20:43 │ 来源:www.tikuol.com 题型:选择题 问题: 下列各组物质中,带点的同种元素的化合价相同的是A.Cl2、NaClB.NH3、HNO3C.MnO2、KMnO4D.CO2、H2CO3
题型:选择题 读对话,判断正(√)误(×)。Amy: Excuse me. Where is the library? Wu: It's near the gym. Amy: And then? Wu: Turn left at the gym, then go straight. It's on the left. Amy: Thank you. Wu: You're welcome.( ) 1. Amy wants to go to the cinema.( ) 2. She goes there by bus.( ) 3. She turns left at the gym.( ) 4. The library is on her left. 查看答案