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【单选题】
(2016·新课标全国III卷文综·31)1980年与1975年相比,我国粮食播种面积减少6884万亩,总产量却增加674亿斤;棉花播种面积减少53万亩,总产量增加652万担;油料作物和甜菜播种面积共扩大3626万亩,其总产量分别增加70%和150%。出现这一现象的主要原因是( )A.
农民生产自主权的扩大
B.
农业生产技术有了革命性的改变
C.
农村经济体制改革完成
D.
国家取消对农副产品的统销政策
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皮皮学刷刷变学霸
举一反三
【简答题】灰化土最大的特点是具有灰化淀积层，灰化土的植被以（）为主。
【单选题】The regulating element which can give rapid and advanced adjustment is ______. A. B. integral regulating C. D.
A.
proportional regulating
B.
integral regulating
C.
differential regulating
D.
adaptive regulating
【单选题】The regulating element which can give rapid and advanced adjustment is ____?
A.
Proportional regulating
B.
Differential regulating
C.
Integral regulating
D.
Adaptive regulating
【简答题】A．regulates B．regulate C．regulated D．regulating
【单选题】The regulating element which can give rapid and advanced adjustment is ______.
A.
proportional regulating
B.
integral regulating
C.
differential regulating
D.
adaptive regulating
【单选题】The regulating element which can give rapid and advanced adjustment is ______.
A.
proportional regulating
B.
integral regulating
C.
differential regulating
D.
adaptive regulating
【简答题】A．regulates B．regulate C．regulated D．regulating
【简答题】灰化土最大的特点是具有（）。
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