下图是密闭体系中某反应的微观示意图，若用“o”和“●”表示不同的原子，则
（1）依据质量守恒定律，反应后方框内应再填入一个 _________ 粒子（填序号）．
（2）该反应中的物质属于单质的有 _________ （填序号）．
（3）符合该微观示意图的一个具体反应的化学方程式为 _________ ．
（1）C．
（2）AB．
（3）2H2+O2
2H2O
A king was old and he knew it was time to choose a new king. He told all the young people in the country, “I’ll give 51 of you a seed (种子). Plant it and bring it back one year later. Show me the plant that you bring. 52 I’ll choose a new king from you.” A boy 53 Ling got a seed, too. He planted it 54 . But the seed doesn’t grow at all. A year later, Ling had to take his 55 box to the palace. Others all brought beautiful plants there and Ling felt 56 . The king 57 the palace and look around. When he found there was nothing in Ling’s box. The king smiled and said to the others, “One year ago, I gave everyone a seed 58 couldn’t grow. But all of you, 59 Ling, have bought me plants and flowers. Ling was the only one with the honesty (诚实) and 60 to bring such a box. So he will be the new king  ! ”
|
ich