A:I will fly my kite.
B:I played basketball.
C:I read a book.
1960年独立初期到70年代以前,尼日利亚是一个农业为主的国家,棉花、花生等许多农产品的生产在世界上居领先地位。70年代起尼日利亚经济发展转向石油工业,花生产业每况愈下。近年来,南部热带经济作物发展迅速。下图示意尼日刹亚的主要经济作物和石油产地分布。据此完成下列问题。
A
Ping-pong Club
Do you like to play ping-pong? Do you want to play ping-pong well? Mr. Cai can teach you. You can come here every Saturday afternoon.
Tel: 368-5788
Add: Room 212 in School's PE Building.
Musicians Wanted
Are you a music lover? Can you sing or dance? Can you play the guitar? Can you play the violin? Welcome to our Star Rock Band. Please call Tina at 898-3343 from Monday to Friday (8:30-11:00 am). We will meet every Sunday morning.
①称取0.85克样品,加足量的水充分溶解,过滤得滤液A和0.11克沉淀B;
②将滤液A等分成2份,一份先加少量酚酞试液再滴加稀盐酸至过量,得混合物C,另一份加过量的碳酸钠溶液,得混合物D;
③将混合物C、D倒入一个洁净的烧杯中,发现烧杯中有白色沉淀且上层清液呈红色,过滤,得滤液E和1g滤渣;
④向滤液E中滴加CaCl2溶液,有白色沉淀生成。