判断题
Sage Shun gradually transformed the original tribal alliance meeting into a state organ, which made the Chinese civilization take another solid step forward.
Sage Shun gradually transformed the original tribal alliance meeting into a state organ, which made the Chinese civilization take another solid step forward.
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单项选择题
为什么现代大型地面望远镜多采用自适应光学技术?
为什么现代大型地面望远镜多采用自适应光学技术?
A.为了修正大气扰动对星光的影响
B.为了修正地面振动对望远镜的影响
C.为了修正温度对望远镜的热辐射
D.为了修正重力对主镜形状的影响