我国古代哲学认为物质是“阴阳”组成的对立统一体，阴阳之间既相互对立，又相互统一，既相互依存，又相互制约。下列的化学知识点最能体现“阴阳”对立统一体的是（）

根据短文内容及所给首字母，将正确的单词写在答题卷上
   James works in a food shop. He helps the shopkeeper. He puts f____  on the shelves every day. Then people come into the shop and buy the food. Today there aren’t any bags of flour(面粉) on the shelf.“James,” says the shopkeeper. “We n____  some flour. Bring some bags of flour to the shelf. Hurry up!”
   James runs to get some bags of flour. They are in another room and they are on the top shelf. The shelf is high up. James is tall b____ he can’t reach the bags.
   James bring two boxes and puts one b____  on the other. Then he stands on them. Now he c____  reach(够到) the bags on the shelf.

下列句子，没有错别字的一项是 （      ）