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我国PAR的空间分布与气温分布大致相同 只考虑PAR值,我国农业生产潜力最大的地区是甲地 青藏高原地区农作物单产高与其PAR高有关 我国PAR的空间分布与年降水量分布完全相反
over the mountains than over the rivers. over the rivers than over the mountains. over the oceans than over the land. over the land than over the oceans.
over the mountains than over the rivers. over the rivers than over the mountains. over the oceans than over the land. over the land than over the oceans.
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Q.值夏秋季节大,冬春季节小 PAR值冬春季节大,夏秋季节小 Q.值比PAR值季节变化更大 Q.值与PAR值在同一个月达到最大值 15.造成太湖地区太阳总辐射(Q)6月和8月差异的主要因素是 A.太阳高度 B.白昼长度C.地面反射率D.天气状况
ASR和PAR 示位台、PAR和ASR 中指点标不影响直线进近着陆的最低标准
over the mountains than over the rivers over the rivers than over the mountains. over the oceans than over the land. over the land than over the oceans.
RR和PAR RR和PAR% RR和AR PAR和PAR% AR和PAR
form shape background direction
Q值夏秋季节大,冬春季节小 PAR值冬春季节大,夏秋季节小 Q值比PAR值季节变化更大 Q值与PAR值在同一个月达到最大值 7.造成太湖地区太阳总辐射(Q)6月和8月差异的主要因素是 A.太阳高度 B.白昼长度 C.天气状况 D.地面反射率
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AR和PAR RR AR AR%和PAR% PAR