问题
选择题
| — The physics exam is not difficult, is it? — ________. Even Tom ________ to the top students failed. |
A. Yes; belongs B. No; belonged C. Yes; belonging D. No; belonging |
答案
答案：C
搜题请搜索小程序“爱下问搜题”
| — The physics exam is not difficult, is it? — ________. Even Tom ________ to the top students failed. |
A. Yes; belongs B. No; belonged C. Yes; belonging D. No; belonging |
答案：C
下列有关实验操作、现象和解释或结 论都正确的是( )
| 操 作 | 现 象 | 解释、结论 | |
| A | 过量的Fe粉中加入硝酸充分反应，滴入KSCN溶液 | 溶液呈红色 | 稀硝酸将Fe氧化为Fe3+ |
| B | AgI沉淀中滴入稀KCl溶液 | 有白色沉淀出现 | AgCl比AgI更难溶 |
| C | Al箔插入稀硝酸中 | 无现象 | Al箔表面被硝酸氧化，形成致密的氧化膜 |
| D | 用玻璃棒蘸取浓氨水点到红色石蕊试纸上 | 试纸变蓝色 | 浓氨水呈碱性 |