材料一：蜂兰的唇形花瓣常常与雌黄蜂的外表褶近．可以吸引雄黄蜂前来“交尾”．雄黄蜂从一朵蜂兰花飞向另一朵蜂兰花，就会帮助蜂兰花传粉．

材料二：土壤是陆地环境的重要组成部分．在土壤的形成过程中，生物起着重要作用．被誉为植物界拓荒者的地衣，能够在光秃秃的岩石表面生长，地衣能够分泌地衣酸，腐蚀岩石，使岩石表面逐渐龟裂和破碎，借助长期的风化作用形成原始的土壤，从而为其他植物的生存创造条件．植物的根系对土壤起着黏附和固着作用．植被覆盖在土壤表面，对土壤起着保护作用．土壤中的动物（如蚯蚓）的活动，可以使土壤疏松，增加土壤的通气性．总之，如果没有生物，地球上就不会有土壤．

上述材料一说明生物与环境的关系是____．

上述材料二说明生物与环境的关系是____．

据此分析，将A和B分离的常用方法是（   ）

In order to safeguard（保证）the education of all Hope Chinese Scholl（HCS）students and the normal running of the school, the following rules should be followed:
★ Be quiet in classroom and hallways. Do not run or shout in classrooms or hallways.
★ Do not drink or eat in classrooms or hallways.
★ Stay in the school during school time as well as rest time. Do not leave the school or play out of the school area during school time. This includes rest time.
★ Do not scribble on any desks or walls.
★ Be respectful（尊敬）to teachers and parents.
★ Help teachers and other students to keep the classroom clean. Do not move desks, chairs, and other furniture in the classroom without the teacher's instructions.