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题目内容
Technological developments in the nineteenth century took longer to ________ than they do today: many of that century's advances were known to scientists but not to average people.
- Aoccur
- Bpropagate
- Caccelerate
- Dmultiply
- Espread
- Fincrease
B,E显示答案
以上解析由 考满分老师提供。