A：磨制石器
B：古代炼铁
C：烧制陶器
D：利用沼气
Car Services
Bring your car into Car Services today！We will clean your car and repair your engine at very reasonable prices. Drive your car into our workshop located at Xinhua Road, or make an appointment.
Tel:7195638
Car Washing: ¥10
Engine Repairing: Only ¥180
Tyre (轮胎) Servicing: ¥15 for each
The building which saves people from bad weather.
This building near the sea in New Orleans looks like something from a scifi film (科幻电影). It is over 360 meters high, and is designed to house up 40,000 people, named the Noah. This building is strong enough to avoid the damages of bad weather.
Beach Cleanup Day
We need volunteers to clean the beach！
Sunday, July 20
Meet at 8:30 a.m. at Coast Square.
Start at 9:00 a.m. and end at noon.
Bring bags and gloves.
For more information, call Zhang Lin at 564-0657.
Apartment to Rent (出租)
A new apartment to be rented in the city centre. One bedroom and one kitchen. Near the bus station, at No. 22 Changjiang Road. Buses pass the front gate.
If you are interested, please have a look at the apartment or you can call Mrs. Yu at 2747130.
组别
步骤
甲
乙
丙
1
2%蔗糖液2mL
2
蒸馏水1mL
酵母提取液1mL
稀释唾液1mL
3
37℃恒温水浴，保温10分钟
4
斐林试剂1mL
5
50～65℃温水中加热2分钟
实验结果
蓝色
砖红色
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