Metals ___ When they are heated.
举一反三
- Water, （） enough, can change into vapour quickly. A: when heated B: heating C: though to be heated D: when is heated
- When ____________ , ice will be changed into water. A: heating B: heated C: having been heated
- When ,ice changes into water. A: to heat B: heating C: heated D: they are heated
- What happens when the water is heated by solar power?
- 中国大学MOOC: Generally speaking, all kinds of materials will expand when heated but will _____ when cooled.