将与羊毛衫摩擦过的气球靠近头发，会看到如图所示的惊奇现象．这是由于气球摩擦后_________，会__________不带电的头发．
带了电；吸引．
下列离子方程式与所述事实相符且正确的是
A．漂白粉溶液在空气中失效：ClO－＋CO2＋H2O＝HClO＋HCO3－
B．用FeCl3溶液腐蚀铜板制印刷电路板：Fe3＋＋2Cu＝Fe2＋＋2Cu2＋
C．向NaAlO2溶液中通入过量CO2制Al(OH)3：AlO2－＋CO2＋2H2O＝HCO3－＋Al(OH)3↓
D．碳酸氢铵溶液中加入过量氢氧化钠溶液：HCO3－＋OH－＝CO32－＋H2O
根据首字母，完成句子。
1. Could you mind c _____ window? It's cold outside.
2. We need to come up w _____ some ideas.
3. Do you a _____ with me?
4. Whether to go or not, you'd better make a d _____ yourself.
5. Are you looking f _____ to winning the English peech contest?
