下图为我国四省某年三种常规能源生产的相对比例(均已折算成标准煤)。①、②、③代表的能源依次是

小强用实验探究液体内部的压强与深度的关系及与液体密度的关系．他分别在玻璃杯中装入适量的水和适量的浓盐水．当把压强计探头放入液体中时，压强计的两液面高度差为h₁，如图甲所示；当把压强计的探头放入液体中时，压强计的液面高度差为h₂，如图乙所示．已知：h₁=h₂，则____ 为盐水（选填：“甲”或“乙”）．

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