题干
. They were surprised that a child could work out the problem ______ they themselves couldn’t.
A：once
B：while
C：the
D：if
答案(点此获取答案解析）
B
A：once
B：while
C：the
D：if
同为刺绣，却有蜀绣、苏绣、粤绣、湘绣等区分；同名粽子，除了传统的红枣馅儿、桂花馅儿，更有现在的鲜肉馅儿、水果馅儿等花样…… 中华文化在人类历史长河中传承并不断丰富和发展。以上材料说明，中华文化（ ）