题目

构成物质的微粒有多种，下列物质由离子构成的是（ ） A．水银 B．金刚石   C．氯化钠   D．水 答案：【考点】物质的构成和含量分析． 【分析】根据金属、大多数固态非金属单质、稀有气体等由原子构成；有些物质是由分子构成的，气态的非金属单质和由非金属元素组成的化合物，如氢气、水等；有些物质是由离子构成的，一般是含有金属元素和非金属元素的化合物，如氯化钠，进行分析判断即可．阅读表达阅读下面短文，根据其内容完成后面各项任务。Running away is a serious problem. There are lots of runaway and homeless kids living in the streets around the world.孩子们为什么想离家出走呢？★Some kids run away because they have problems with their families.★Some kids run away because they’re afraid to tell their parents the bad things that they did at school or in society.★Some kids run away because there is violence(暴力) in the family.★Some kids run away because their parents divorce(离婚) or marry again.★Some kids run away because they have problems at school.What will you do if your friends want to run away from home?If your friend is thinking about running away, tell him or her that it is difficult to survive(幸存) in the streets. Try to help your friend feel less alone.Whatever the problem is, there are other ways to solve it. Maybe you can’t think of the ways right now, but an adult(成年人) will know how to help you. You should tell an adult that your friend plans to run away as soon as possible. Being a real friend doesn’t mean keeping a secret that may hurt someone. And running away isn’t a solution(解决方法) for either of you.It only makes more problems and danger.1.将文中划线部分的汉语句子译成英语。2.回答问题：Kids run away because of many reasons. How many reasons are connected with their schools?3.将文中划线部分的英语句子译成汉语。4.从文中找出与所给句子意思相同的句子。If a secret may hurt someone, you shouldn’t keep it even though you’re someone’s real friend.5.回答问题：What does the underlined word “It” in the last sentence refer to(指的是)？