题目

对下列平衡体系，改变条件后平衡不会正方向移动的是 (    )   A. C(s)+CO22CO（加入木炭）   B. Ca（OH）2Ca2++2OH-（加入HCl）  C. H2SH++HS-（加入NaOH）    D. 3NO2+H2O(l)2HNO3(l)+NO（增大压强） 答案：A根据句子意思，用方框内所给词的适当形式填空，每词只能用一次。（5分） they     health      easy     run      play 1.Liu Xiang is one of the best                in the world. 2.You’d better not                on the street. It’s dangerous. 3.Don’t eat that                food. It may cause a stomachache. 4.The girls bought                some flowers and a tie for their father. 5.Datong Bookstore is only 100 meters away. You can find it               .