有区别 周票有本周购买时间的限制 up to Thurs. 下周开始购买的日期 is Friday. 周票需要您的照片

You can buy  周票 at the RATP station customer service at CDG upon arrival.  I bought mine for the following week when I arrived CDG but flew to Nice a few hours later.  When I returned to CDG I then used the weekly ticket for Roissy Bus to the Opera House, then used the RATP to my first three days hotel Renaissance at La Defence.