题目

下列物质露置在空气中质量增加且变质的是（ ） A．生石灰   B．浓盐酸   C．浓硫酸   D．食盐 答案：【考点】空气中常见酸碱盐的质量或性质变化及贮存法；生石灰的性质与用途． 【专题】常见的酸 酸的通性；常见的碱 碱的通性． 【分析】敞口瓶久置于空气发生变质即发生了化学变化，也就是与空气中的成分发生了化学反应，生成了新的物质使物质的质量增加，根据常见物质的化学性质进行分析判阅读下面一篇短文，根据所读内容在文后表格中的空白处填入恰当的单词。注意：每一个空只填一个单词。 Diversity means the differences between things or people; the variety makes us unique. People have a great deal of diversity. Even though our basic body structure is the same (head, eyes, heart, arms, legs, feet, etc.), our physical characteristics are different. For instance, the color of our skin, hair, and eyes are different. Also, our height and shape provide some diversity too. Even our fingerprints are unique and different. People have to develop their own thoughts ,opinions, feelings, and ideas about different topics and beliefs.We are influenced by different people, places, and experiences in our lives which may influence us when we have to make a decision. A person has to keep open-minded when developing an opinion. Gathering information is also crucial（决定性的） to make a decision. The more you know about a topic, the easier it will be to make a good decision. As people grow up, they may even change their previous opinions and have new ideas. Every person has unique talents, characteristics, and challenges to share with the world. Some people are good at reading and writing. Other people are talented at art and music. Some people are good at working with numbers or science. Others are talented by sharing their creativity. Some people have challenges to work with like being deaf, blind, or learning differently than others. It is important to remember that no matter what a person is good at or struggles with, we are all special in our own way. When we are used to other people’s differences, we are showing respect. And we can find that we belong to the world and can give any thing a reason throughout the world. We can learn about a variety of cultures, places , and different ways to look at the world. Title: The 1._______ in the world Definition Diversity means the differences between things or people Types of diversity The physical diversity Our 2.______ look different. The3._____ diversity We have our own different viewpoints and4._____. We make different decisions when we are facing the same situation. Our opinions 5._________ as we experience more and more in life. The personal diversity We have different 6._______. We have different 7.______ styles. The benefits from 8._______other people’s differences We can let other people know that we respect them. We become 9._________. We can 10._______ our knowledge and perfect our view of  life.