根据句意及首字母或汉语提示完成单词。①China is a l____ country with a long history.②What s____ shoes would you like?③We often have rice,meat,____ (马铃薯) for lunch every day.④What ____ (饮料) would you have?⑤We have many great ____ (特色菜) in the restaurant.
等质量的两种常见金属A和B,分别与足量的稀硫酸反应,生成正二价的金属硫酸盐和氢气.生成氢气的质量与时间关系如图,
请结合所学知识回答:
下图中最利于聚落形成与发展的是