中国大学MOOC:"The Romans were the first to ___________ concrete as a building material.";
举一反三
- 中国大学MOOC: Concrete is a polluting material, so all green building materials can be used to replace it.
- 中国大学MOOC: Concrete, the _____gray material, is arguably the most widely-used construction material worldwide.
- 中国大学MOOC: Which of the followings were NOT brought the Romans?
- 中国大学MOOC: The first stage in brand building is to ______ the brand.
- Concrete is a polluting material, so all green building materials can be used to replace it. A: 正确 B: 错误