题目

完形填空.Food is very important. Everyone needs to ___1__ well if he or she wants to have a strong body. Our brains (大脑) also need a kind of food. This kind of food is __2___. We begin to get knowledge (知识) When we are very young. Small children are interested in everything around them. They learn ___3__ while (当) they are watching and __4___.When they are getting older, they begin to ___5__ storybooks, anything they like. When they find something new, they like to ask questions and __6___to find out the answer.What is the best ___7__ to get knowledge? If we __8___ by ourselves, 人类使用金属材料历史悠久。下列说法不正确的是A. 电解NaCl溶液制备NaB. 电解熔融MgCl2制备MgC. 钢体船外镇嵌锌板可起防腐作用D. 青铜器的材质属于含锡合金