题目

听下面一段独白，回答以下小题。【1】What is the purpose of the staff meeting?A.To find ways to help Mrs. Smith.B.To hear how Mrs. Smith is doing.C.To figure out what’s wrong with Mrs. Smith.【2】Where did Mrs. Smith feel the pain?A.In her arm. B.In her lung. C.In her shoulder.【3】How long has Mrs. Smith worked at the company?A.Less than two weeks. B.About three months. C.Over five years.30、钠原子和钠离子的结构示意图如下：请回答：（1）由于它们的原子核内质子数相同，所以它们都属于钠元素．（2）钠原子和钠离子的化学性质（填“相同”或“不相同”）不相同．