据统计，采用标准设计，可加快设计进度( )。
A．10%～15%
B．1～2倍
C．20%以上
D．3倍以上
参考答案：B
解析：[知识点] 推行标准设计
Beibei, ________ back to the Song Dynasty, was once again made top in a list of “the cleanest districts (区域) of Chongqing” recently.
A．dated
B．dates
C．dating
D．had dated
品种推广
