中国大学MOOC: Which one in the following is not the usage of gunpowder?
举一反三
- Which one in the following is not the usage of gunpowder? A: fireworks and signal flares B: grenade and cannons C: medicine with which emperors hoped to live longer. D: cosmetics（化妆品）
- 中国大学MOOC:"In the following statements, which one is right? ";
- 中国大学MOOC: Which one of the following cases is not ethnocentric?
- 中国大学MOOC: Which one of the following statement is correct? ( )
- 中国大学MOOC: Which one of the following statements is right?