题目

下列物质中,导电性能最差的是()。A.熔融氢氧化钠          B.石墨棒C.盐酸溶液                  D.固态氯化钾 答案:D【试题分析】解题的关键是掌握物质导电的条件,物质中有“自由电子”或“自由移动的离子”是物质导电的必要条件。选项中只有固态氯化钾不含“自由移动的离子”,不导电。故答案为D。1.A good book can teach you things beyond your class.It can open your eyes and clear your minds.If you want to get into a good reading habit,there are a number of ways to develop it.Plan your timeYou should give yourself at least thirty minutes in all for reading every day.When time is set,nothing can change it.For example,make it a habit to read during breakfast or lunch time.Always carry a bookWherever you go,take a book with you.When you leave the house,make sure that youalways carry a good book as well as your school things.Remember that a book always stayswith you.Find a quiet placeFind a place in your home where you can sit in a comfortable chair.When you read a book,no one will trouble you.There should be no television,computer,music or even noisy familymembers around you.Have a library dayHave a library card,and you read as many good books as possible in the library.Make itweekly trip to the library,you can save a lot of moneyBlog itOne of the best ways to develop a good reading habit is to put it on your blog(博客).If you don't have one,create one.It's free.Ask your friends and family to go there to share your ideas and offer you suggestions.  TitleSome ways to have a good reading(51)habit  Plan your timeYou should read at least half a(n)(52)hourevery day.Make it a habit to (53)readduring breakfast or lunch time. Always(54)carry/takea bookMake sure a book always stays with you Wherever you go. Find a quiet place Find a place at home with a (55)comfortablechair and without television,(56)computers,music or noisy people around you. Have a(57)libraryday It is a very cheap way to read good books in the library.Go on a trip to the library every(58)week. Blog itIt (59)needs/costsno money to create a blog.Your friends and family can share your ideas and(60)offer/giveyou some suggestions online.
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