题目内容
15．When did the foreigners learn to make silk？A.2，000 years ago．
B．In the sixth century．
C.400 years ago．
分析 略
解答 B
点评 略
练习册系列答案
相关题目
A.2，000 years ago．
B．In the sixth century．
C.400 years ago．
题目内容
15．When did the foreigners learn to make silk？分析 略
解答 B
点评 略