题目

完型填空12 A good memory is a great help in learning a language. Everybody， 1 his own language by remembering what he 2 when he is a small child. Some boys and girls who live in foreign countries 3 their parents seem to learn two languages almost as 4 as one. In school it is not easy to learn 5 second language because the pupils have 6 time for it，and they are busy with other subjects，too.A man' s mind is rather 7 a camera，It takes photos not only of what we see，but of what we feel，hear，smell and taste. 8 we take a real photo with a camera，we have mu请你根据如图所示通电螺线管中的电流方向，标出螺线管的N、S极和磁感线方向．