如下图所示，将与丝绸摩擦过的玻璃棒去靠近用细线悬挂着的轻质小球。如果小球被排斥，那么这个小球带______电。
正
当电网发生故障，如有一台变压器损坏时，其他变压器允许长时间过负荷运行。
If the revenue from the sale of apples was equal to the revenue from the sale of miscellaneous items, what PERCENT of the revenue from the sale of fruit and vegetables was accounted for by apples ？
