题目

People know the dangers of fires.It's good for a family to learn how to prepare for a fire.Here are some suggestions: Put a smoke alarm in the house.Smoke from a fire causes the alarm to go off.The alarm makes a loud sound.The sound tells everyone to leave the house at once. Make escape plans.They should know all the ways out of the house.If there is a fire,everyone follows the plan to get out.Part of the plan is to check all the windows to make sure they can be opened easily. Buy fire extinguishers(灭火器)in the house.Everyone in the family should know how to 环境人口容量是指一个地区或一个国家能持续供养的人口数量。1850年,清朝的人口为4.3亿。 当时的学者汪士铎惊呼:“人多之害,山顶已植黍稷,江中已有洲田,川中已辟老林,苗洞已开深菁,犹不足养……”而今天的中国,不但养活了13亿人,人们的生活水平比那个时代还提高了许多。据此回答1-2题。 1.以上材料表明,影响环境人口容量的重要因素是 (  ) A.地区对外开放程度 B.人口的生活与文化消费水平 C.科技发展水平 D.蕴藏的资源数量 2.随着人口不断增加,我国必须进行人口合理容量的估计,其主要意义在于  (  ) A.限制高消费现象的产生 B.规划农业生产的发展规模 C.制定人口战略和人口政策 D.帮助贫困地区脱贫致富
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