There _______ a football match on TV this evening. A. will have B. is going to be C. has D. is going to have 答案:B关于磁感应强度,下列说法正确的是( )A.根据 B=F/IL 可知,在磁场中某确定位置,磁感应强度与磁场力成正比,与电流和导线长度的乘积成反比B.一小段通电直导线放在磁感应强度为零的位置上,它受到的磁场力一定等于零C.一小段通电直导线在空间某处不受磁场力作用,那么该处的磁感应强度一定为零D.磁场中某处的磁感应强度的方向,跟电流在该处所受磁场力的方向相同