题目

如图中，电路连接正确，通电后小磁针指向如图所示（涂黑端表示N极），请在图中标出电源的“+”、“﹣”极，并画出螺线管的绕法． 答案：解：如图：----Matthew said that he was very _______. How about Jack? ----He was satisfied with Matthew’s _______, and wanted the unpleasant business over.A．frightened; suggestionB．sorry; offerC．sorry; apologyD．pleased; request