标题: 没人吗？这篇文章好难写，跪求版主现身 [打印本页] 作者: jackabigail 时间: 2013-7-19 12:01 标题: 没人吗？这篇文章好难写，跪求版主现身 Although forecasts of presidential elections based on opinion polls measure current voter preference, many voters keep changing their minds about whom they prefer until the last few days before the balloting. Some do not even make a final decision until they enter the voting booth. Forecasts based on opinion polls are therefore little better at predicting election outcomes than a random guess would be
