题目

You probably know who Marie Curie was, but you may not have heard of Rachel Carson. Of the outstanding ladies listed below, who do you think was the most important woman of the past 100 years?Jane Addams (1860-1935)Anyone who has ever been helped by a social worker has Jane Addams to thank. Addams helped the poor and worked for peace. She encouraged a sense of community by creating shelters and promoting education and services for people in need. In 1931, Addams became the first American woman to win the Nobel Peace Prize.Rachel Carson (1907-1964)If it weren’t for Rachel Carson, the environm4、下图中，两条虚线之间的部分表示生态系统功能正常的作用范围。y表示一个外来干扰使之偏离这一范围的大小；x表示恢复到原状态所需的时间；曲线与正常范围之间所夹的面积可以作为总稳定性的定量指标（TS）。下列说法正确的是         A．y值大小可作为生态系统恢复力稳定性的定量指标     B．在遭到干扰时，x、y值的大小与生物种类有关，与数量无关     C．对同一个生态系统来说，y值和x值之间呈负相关     D．PS值越小，这个生态系统的总稳定性越大 评卷人 得分 二、填空题 （每空？ 分，共？ 分）