People diamonds with crystal. (imitation)
举一反三
- Congo is accused of ______. A: smuggling diamonds B: trading in smuggled diamonds C: trading in fake diamonds D: producing fake diamonds
- In mining industry, “black diamonds” are （ ）.
- What's right about the general properties of crystal? A: If there are anions in a crystal, there must be cations B: If there are anions in a crystal, there must be cations C: There are not necessarily chemical bonds in molecular crystals D: There must be no covalent bond in the ionic crystal
- In the “imitation lag” hypothesis,
- An ionic crystal consists of cations and anions, therefore, the ionic crystal can conduct electricity.