题目

It's true that beauty does not always meet with a single, uniform standard. A person's cultural background, for example, may influence __________ he or she find attractive in others. A . that B . which C . what D . when 答案：C5．作图（1）如图1，质点沿圆周做逆时针方向的匀速圆周运动，先后通过A、B、C三点，试画出：①质点经过A点时的速度②从B点到C点的位移．（2）如图2所示，金属棒ab在匀强磁场中沿金属导轨向右运动，请在图中画出螺线管中感应电流的方向和ab棒所受磁场力的方向．