The dress is ________ expensive. I won’t have it. A. much too B. too much C. much more D. more much 答案:A 关于磁感应强度,下列说法正确的是( )A.由可知,B与F成正比,与IL成反比B.通电导线放在磁场中某点,该点就有磁感应强度,如果将通电导线拿走,该点的磁感应强度就变为零C.通电导线所受磁场力不为零的地方一定存在磁场,通电导线不受磁场力的地方一定不存在磁场(即B=0)D.磁场中某一点的磁感应强度由磁场本身决定