下列有关磁场方向的说法正确的是（ ）
A．磁场的方向就是该点的磁感应强度的方向
B．磁场的方向就是通过该点的磁感线的切线方向
C．磁场的方向就是通电导体在该点受到的磁场力的方向
D．磁场的方向就是小磁针北极在该点受到的磁场力的方向
A、磁感应强度用来描述磁场的强弱和方向，磁场的方向就是该点的磁感应强度的方向．故A正确．
B、磁感线可以形象表示磁场的强弱和方向，其切线方向就是该点的磁场方向，故B正确．
C、磁场的方向与通电导体在该点受到的磁场力的方向垂直，故C错误．
D、磁场的方向就是小磁针的N极在该点受到的所受的磁场力的方向，故D正确．
故选：ABD．
A young man was getting ready to graduate（毕业）from college. For many months he had admired（欣赏，羡慕） a beautiful sports car in a seller's showroom, and knowing his father could it, he told him that was all he wanted. On the morning of his graduation day his father called him into his own study and told him how he was to have such a fine son. He handed his son a beautiful gift box. but slightly（轻微地） disappointed, the young man opened the box and found a lovely book. ,he raised his voice at his father and said, "With all your money you only give me a book?" Then he rushed out of the house, the book in the study. He didn't contact（联系） his father for a whole year one day he saw an old man who looked like his father in the street. He realized he had to go back home and see his father. When he arrived at his father's house, he was told his father had been in hospital for a week. When he was going to the hospital, he saw the new book still on the desk, just as he had left it one before. He opened it and began to turn the pages. Suddenly, a car key _____ from an envelope(信封) behind the book. It had a tag（标签）.On the tag was the of his graduation, and the words PAID IN FULL.
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