【简答题】(a) What is the capacity for electrons of an s sublevel? A p sublevel? A d sublevel? An f sublevel? (b) What is the total capacity for electrons of the fourth principal level?
【简答题】用am,is,are填空。 1. Where _____________ you from? I _____________ from China. 2. Where _____________ he from? He _____________ from England. 3. What _____________ your mother? She _____________ a teac...