问题 问答题 简答题

简述我国耕地面积不断减少的主要原因以及如何实现我国耕地总量动态平衡的目标。

答案

参考答案:

主要原因:最主要的原因是大量耕地以及其农业用地被变更用途作为各类建设用地;其次由于不良的耕作制度,滥施化肥,破坏了部分现有耕地的化学结构,使其不能再作为耕地使用;再次,荒漠化程度加深,濒临沙漠的一些地区的耕地或被沙漠吞噬或土壤肥力尽失,不能再继续使用。

实现耕地总量动态平衡包括以下内容:

一、耕地总量动态平衡应以人类对食物需求的持续供求平衡为目标。既能保证人口对食物的持续需要,又能保证经济社会的健康、稳步和有序发展,这才是耕地总量动态平衡的根本目的

二、耕地总量动态平衡应建立在区域平衡的基础上,强调自我平衡,中国耕地养中国人。

三、耕地总量动态平衡要有长远性,即使在人口高峰期,也能满足粮食生产用地的需要。

四、耕地总量动态平衡要考虑环境的适应性,增加符合生态建设要求的新耕地。

五、耕地总量动态平衡的重点是追求质量的平衡,尽快提高现存和新增耕地的质量,使产出率逐步提高。

单项选择题

Euthanasia has been a topic of controversy in Europe since at least 1936. On an average of six times a day, a doctor in Holland practices "active" euthanasia: (1) administering a lethal drug to a (2) ill patient who has asked to be relieved (3) suffering. Twenty times a day, life prolonging treatment is withheld or withdrawn (4) there is no hope that it can (5) an ultimate cure. "Active" euthanasia remains a crime on the Dutch statute books, punishable (6) 12 years in prison. But a series of court cases over the past 15 years has made it clear that a competent physician who (7) it out will not be prosecuted.

Euthanasia, often called "mercy killing", is a crime everywhere in Western Europe. (8) more and more doctors and nurses in Britain, Germany, Holland and elsewhere readily (9) to practicing it, most often in the "passive" form of withholding or withdrawing (10) The long simmering euthanasia issue has lately (11) into a sometimes fierce public debate, (12) both sides claiming the mantle of ultimate righteousness. Those (13) to the practice see themselves (14) sacred principles of respect for life, (15) those in favor raise the banner of humane treatment. After years (16) the defensive, the advocates now seem to be (17) ground. Recent polls in Britain show that 72 percent of British (18) favor euthanasia in some circumstances. An astonishing 76 percent of (19) to a poll taken late last year in France said they would like the law changed to (20) mercy killings. Obviously, pressure groups favoring euthanasia and "assisted suicide" have grown steadily in Europe over the years.

16()

A.in

B.for

C.on

D.against

多项选择题