近年来，严重的雾霾天气使我国中东部地区的城市遭受了严重污染。下列不属于空气污染物的是（   ）

    We high school students do have some growing pains, but we can get rid of them ____ (correct) and wisely____, some of us are upset____ our body styles and looks. It's unnecessary and it's not important at all. We needn't care about it. It is one's inner beauty ____ matters. Second, we sometimes seem to be misunderstood by our teachers, parents and classmates.____ (face) with this, we can find a proper time to have a heart-to-heart talk with them, trying ____ (remove) the misunderstanding. Some of us have fewer friends. I think being open-minded and friendly will do you good. Third, we may fall behind others____ makes us stressed. Actually we can encourage ____ to work efficiently, full of____ (determine). At last, some of us don't have much pocket money, so we feel unhappy. Isn't it strange? So long as we have some, that's enough. And we can learn ____ to spend money.

对比是学习化学的重要方法.下列关于 与CO的比较错误的是(       )

4×2-4＝____        4×1＝____

4×3+4＝____        4×4＝____