【简答题】S1:What was the number of person in liferafts?S2:The number of persons in liferafts was 25.Q:What is the topic?A. The number of liferafts launched. B. The number of persons in liferafts. C. The number...
【简答题】The number of protons in the nucleus is equal to the number of electrons outside the nucleus in an atom and is called the atomic number of the atom.