题目

Sometimes...Sometimes I feel lonely,Like I’m by myself with no one here.When I’m that way, I call a friend.My lonely mood(心情) soon disappears(消失).Sometimes I feel excited,Like I have some news I have to share!My friends open their ears to me.They always listen, talk, and______Sometimes I feel so sad,Like my world is cold and darkest blue.At those times my friends let me knowThey’re with me, standing strong and true.Sometimes I feel mixed-up,Like I just don’t know how I should feel.My friends then help me_____What’s right and wrong, what’s false and real!【小题1】【小设NA代表阿伏加德罗常数的数值，下列说法正确的是（ ）A.1mol硫酸铝钾中阴离子所带电荷总数为2NAB.等质量的乙炔和苯分别完全燃烧，乙炔和苯都消耗7.5NA个氧气分子C.将0.1mol碳酸钠溶于1L水中，所得溶液含有CO 和HCO 共0.1NA个D.在H2O2作燃料电池的负极原料时，每摩尔H2O2转移的电子数为2 NA