题目

       Are you looking for a summer reading list for your child or teen? Keep your child reading all summer with this selection of 2012 summer reading lists． Books for primary school students Kenneth Cadow: Alfie Runs Away        When his mother wants to give away his favorite shoes just because they're too small, Alfie decides he's had enough． Kate Feiffer: My Side of the Car        It might be raining on Dad's side of the car, but imaginative Sadie argues that it is not raining on her side, so their trip to the zoo doesn't need to be put off． Books for high sc如图所示，根据通电螺线管的N、S极标出磁感线方向、小磁针N极和电源“+”“—”极。