某外国古建筑学会准备参观最具有中国特色的古代建筑，旅行社的导游应该推荐他们去参观[ ]
A．
避暑山庄
B．
万里长城
C．
故宫
D．
赵州桥
答案：C
Their forgetting the date of the discussion showed that they did not understand the________of the
question. [ ]
A . quality
B. patience
C. importance
D. difference
流量历时曲线
