A:用浓硝酸做试剂比较铁和铜的金属活动性
B:使用干燥洁净玻璃棒将氯水滴在干燥pH试纸上,测定氯水的pH
C:欲检验Br-的存在,可在溶液中先加入氯水、再加入CCl4,振荡、静置,观察下层溶液显橙红色
D:氢氧化铁胶体在直流电场中,一段时间阴极附近红褐色加深,说明胶体带正电荷
1. Please clean up before leaving.2. Showers(淋浴)to be taken before 11 p.m..3. No staying out after 10 p.m. unless allowed by me.4. You may have incoming calls on my phone but no outgoing calls.5. Bed time is 11 p.m.6. Dinner is at 7 p.m. unless notified(通知). (If you don’t have dinner, you must let us know before 6 p.m.)7. Keep noise to the least.8. No smoking in the bedroom. The Address you are staying at is: 112 Kendal Way Cambridge My contact number: 07870 347980
The bus station is ____ ____ ____ ____ ____ the road.