A：1L0.1 mol•L﹣1的氨水中含有0.1NA个OH﹣
B：78gNa2O2固体中含有的阴离子数目为2NA
C：常温下，23gNO2和N2O4的混合气体含有NA个氧原子
D：常温下，4gCH4中含有4NA个C﹣H共价键
The sun comes up in the east and goes down in the west. When the sun rises， It is morning. When the sun sets， it is evening. When the sun is shining， it is day. Morning is the time between sunrise and twelve o'clock， or between sunrise and lunch. At twelve o'clock， the sun is the highest in the sky over our heads. The sun is overhead at noon. The sun shines during（在……期间）the day. The moon and the stars shine during the night. When the sun rises， it is light. It's light during the day. During the night， if the moon is not shining， it is dark. What are the days and nights like in summer? In summer the days are longer and the nights are shorter. What about in winter? In winter， the days are shorter and the nights are longer.
①加入稍过量的Na2CO3溶液；
②加入稍过量的NaOH溶液；
③加入稍过量的BaCl2溶液；
④滴入稀盐酸至无气泡产生；
⑤过滤．
下列说法正确的是（ ）
