你认为该如何提升游客的旅游文明素质？
参考答案：
加强宣传引导；注重优化环境；培养良好习惯；建立长效机制。
After the new type of rice was introduced, the farmers produced _______ rice this year as last year.
A．as twice much as
B．twice as much as
C．twice much as
D．twice as much
读下图。对该竹简制作年代的推论相对合理的是（）
A.汉代制作，因为竹简出土于汉墓
B.春秋时期制作，因为竹简内容是《论语》
C.肯定不是汉代制作，因为书写材料是竹简
D.肯定不是春秋时期制作，因为字体是隶书
