1 L某混合溶液中,溶质X、Y浓度都为0.1mol·L—1,向混合溶液中滴加0.1 mol·L—1某溶液Z,所得沉淀的物质的量如图所示,则X、Y、Z分别是( )
见到好朋友问好,你会说: A. What’s your name? B. How are you? C. How old are you?
早上去上学,路上遇见同学Anne,你会对她说: A. Good morning, Anne. B. I am Anne. C. My name is Anne.
scarf is this? A. Who B. What C. Whose
Lookthat elephant. A. in B. on C. at
I like jambread. A. or B. and C. between