太阳活动最激烈的显示是( )
给下面的字组词
晓____ 眠____ 觉____ 处____
闻____ 春____ 多____ 少____
She _____ some of the food for her husband and went out.
先化简,再求值:x2-1x-12﹣xx-1÷12x,请选取一个适当的x的数值代入求值.