题目

阅读下面短文，从短文后各题所给的 A、B、C和D四个选项中，选出可以填入空白处的最佳选项。When discussing the causes ofanimal endangerment, it is important to understand that individual species arenot the only factors involved in this difficult situation. Endangerment is abroad 1,one that involves the habitats and environments where species live and interactwith one another. Although some measures are being taken to help specific casesof endangerment, the universal problem cannot be solved until humans 2 the natural environments where endangeredspecies live. 如图是一种“吸盘式”挂衣钩．将它紧压在平整、光洁的竖直玻璃上，可挂衣帽等物品．它主要部件是一个“橡皮碗”，下面有关的说法错误的是A.被玻璃“吸”住后，皮碗内的气压小于大气压B.皮碗内挤出的空气越少，吸盘贴在玻璃上就越紧C.皮碗与玻璃之间的摩擦阻止衣物向下的移动D.不能紧贴在粗糙的水泥墙壁上，粗糙面与吸盘之间有缝隙、会漏气