关于0.1mol/L Na2CO3溶液的叙述错误的是( )
A:0.5 L该溶液中钠离子的物质的量浓度为0.1 mol/L
B:1 L该溶液中含有Na2CO3的质量为10.6 g
C:从1 L该溶液中取出100 mL,则取出溶液中Na2CO3的物质的量浓度为0.01 mol/L
D:取该溶液10 mL,加水稀释至100 mL后,Na2CO3的物质的量浓度为0.01 mol/L
Whose Dogs?
Tom and his Mum walk in a street. They see a big dog and a small dog there.
"Tom, do you know whose dogs they are?" his Mum asks.
"Sorry, I don't know."
"The big dog is the small dog's Mum." says the mother.
"Oh, I know. The small dog is the big dog's son." answers Tom.
连词成句。