阅读理解。根据短文内容，选择正确答案。

    A lot of boys and girls in west countries are wearing the same kinds of clothes: Many of them have long hair, so it is often difficult to tell whether they ate boys or girls.

    One day, an old man went for a walk in Washington. When he was tired he sat down on a long chair. A young person was standing onthe other side of the pool.

  “Good Heavens!” the old man said to the person who was sitting next to him on the chair. “Do you see that person with long hair? Is ita boy or a girl?”

  “A girl.” said his neighbor, “She's my daughter.”

  “Oh!” the old man said quickly, “I'm sorry. I didn’tknow that you were her mother.”

  “I'm not,” said his neighbor, “I'm her father.”

自20世纪80年代以来，香港的劳动密集型制造企业大量迁入内地。这种产业迁移 (    )

化学变化常伴随着一些现象的出现，如在氢氧化钠溶液中滴加几滴酚酞试液时溶液会____ ，将锌粒放入稀盐酸中会出现____，向硫酸铜溶液中滴加氢氧化钠溶液会出现____ ．

①矛盾的特殊性寓于普遍性之中       ②必须重视局部作用，推动整体的发展

③整体决定事物的性质和发展方向     ④重视量的积累，为实现质变创造条件

饮水中添加含钙、镁、锌、硒的矿物质，可改善人体营养，增强体质，其中“钙、镁、锌、硒”是指（   ）