阅读短文，判断正(√)误(×)。

      We have a new classroom. It's so big and nice. We have a new teacher. She is beautiful (漂亮的). We have

eight new lights and I have a new desk. It's near the window.

( ) 1. We have a new classmate.

( ) 2. We have a beautiful teacher.

( ) 3. We have 6 lights.

( ) 4. My desk is near the door.

( ) 5. I have a new desk.

室温时，向pH=7的蒸馏水中加入一定量的NaHSO₃晶体，保持温度不变，测得溶液的pH=4，下列说法正确的是

A．水电离出的H⁺的浓度是1.0×10^－4 mol·L^－1

B．溶液中离子浓度： c(HSO₃^－)＞c(SO₃^2－)＞c(H₂SO₃)

C．溶液中离子浓度：c(Na⁺)＝c(HSO₃^－)＋2c(SO₃^2－)＋c(H₂SO₃)

D．溶液中离子浓度：c(H⁺)＋c(HSO₃^－)＋2c(H₂SO₃)＝c(OH^－)