礼仪的共同性，主要源于共同的物质生活和文化生活。
参考答案：错
.After the new technique was introduced the factory produced _______cars in 1994 as the year before.
A．as twice many
B．as many twice
C．twice as many
D．twice as
（）时期剪纸手工艺术走向成熟，并达到鼎盛时期。
A、元、明
B、清、民国
C、唐、宋
D、明、清
