【題目】分析下列材料,完成問題。
材料一:
自然資源 | 土地面積 | 礦產(chǎn)資源 | 耕地面積 | 江河年徑流量 | 森林面積 |
總量在世界上的住次 | 3 | 3 | 4 | 6 | 6 |
人均量占世界人均量的比例 | 1/3 | 1/2 | 1/3 | 1/4 | 1/5 |
材料二:l949年我國糧食總產(chǎn)量約為l億噸,人均糧食占有量約為200千克,2003年我國糧食總產(chǎn)量約為4.3億噸,人均糧食占有量約為334千克。
(1)材料一說明我國自然資源總量________、人均量________的特征,造成這一特征的原因主要是________。
(2)材料二提供的數(shù)據(jù)可以看出我國人口增長的速度比糧食增長速度________(快、慢)。
(3)為了使我國人口增長與社會經(jīng)濟(jì)發(fā)展相適應(yīng),與資源、環(huán)境相協(xié)調(diào),我國政府把實行________作為一項長期的基本國策。
(4)目前,我國耕地正在逐年減少,請你說出減少的原因有哪些:________。
【答案】大(豐富);少(。;人口多;快;計劃生育;人口增長,濫占耕地,利用不當(dāng),土地退化、荒漠化
【解析】(1)材料一說明我國自然資源總量大,人均占有量少的特征,造成這一特征的原因主要是我國人口多。
(2)材料二提供的數(shù)據(jù)可以看出我國人口增長的速度比糧食增長速度快。
(3)為了使我國人口增長與社會經(jīng)濟(jì)發(fā)展相適應(yīng),與資源、環(huán)境相協(xié)調(diào),我國政府把實行計劃生育作為一項基本的國策。
(4)目前,我國耕地正在逐年減少,主要由于人口的增長、濫占耕地,利用不當(dāng)、土地退化、荒漠化等。
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