题目

把2016个正整数1、2、3、4、……、2016按如图方式排列成一个表，用一方框按如图所示的方式任意框住9个数.（方框只能平移） （1） 若框住的9个数中，正中间的一个数为39，则：这九个数的和为. （2） 方框能否框住这样的9个数，它们的和等于2016？若能，请写出这9个数；若不能，请说明理由。 （3） 若任意框住9个数的和记为S，则：S的最大值与最小值之差等于.As a school librarian，I’m often asked what books are most appropriate for teaching particularconcepts．As the mother of a toddler，I’m now teaching my son to recognize letters and learn thealphabet．Boaks are a great help in teaching a child letters．Here is this librarian and mom’s picks for the best books to help teach your child letters．Eric Carle’s ABC Eric Carle is one of my favorite children’s authors and this colorful book is perfect for helping teach the alphabet．The block-style letters are easier to readand recognize for toddlers than mitten ones．Each letter is tied to an animal name，so your child will have fun looking at the animals，and 1earn the animalnames while also learning letters．Baby Einsstein：My First Book of Letters The Baby Einstein books always promote thinking skills and creativity in young children．Baby Einstein；My First Book of Letters is no exception．Thisbook includes letters in both upper and lower case，and asks questions about nature that go with each letter for your child to answer．This colorful book is great for helping teach your child letters．Dr．Seuss’ABC Dr．Seuss lends his wonderful writing and illustrating（插图）talent to thisgreat teaching book．His classic writing and funny pictures can be found throughout this alphabet book．The letters are block style，solid-colored，and easyto read．Your child will love learning letters from this fun book．Kipper’s A to Z：an Alphabet Adventure In this book，children follow the little dog Kipper as he works his way through the entire alphabet．The clean，solid font used for the letter makes themeasy to read for young eyes．Author Mike Inkpen does a great job in this book，which tells more of a story than the other booksTeaching your child letters can be a hard task．It’s import to try to make the alphabet fun and interesting for your child．小题1:In Paragraph I，“toddler”probably means       A．babyB．teenagerC．student D．young child小题2:If you want to make your son or daughter interested in nature you should choose      A．Eric Carle’s ABCB．Baby Einstein；My First Book of LettersC．Dr．Seuss’ ABC D．Kipper’s A to Z；an Alphabet Adventure小题3:Why did the author write the passage?A．To recommend the books．B．To sell the booksC．To adverfise the books D．To criticize the books