平常说的老鹰就是鸢,在天空翱翔时,尾羽展开成()A、方形B、扇形C、末端分叉...
Saturday, March 9, 2024
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昆虫的视觉器官是复眼和单眼,其中复眼最多的昆虫是()A、蝴蝶B、甲虫C、蜻蜓D、苍蝇...
Saturday, December 2, 2023
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Wednesday, September 14, 2022
春天,金腰燕会衔泥筑巢,你知道它的泥巢是什么形状的吗?()A、长颈瓶状B、圆杯状C、盘状...
Monday, November 27, 2023
Wednesday, September 14, 2022
Wednesday, September 14, 2022
鸟类的特征是有一对善于飞翔的翅膀,但也有不会飞的鸟,被称为走禽;...
Wednesday, September 14, 2022
下列植物感应活动中,不是由于环境因素的单向刺激引起的是()。A、根向着地心方向生长B、含羞草的小叶合拢C、茎背着地心方向生长...
Tuesday, January 2, 2024
新疆的一个保护鸟类的自然保护区是()。A、阿尔金山自然保护区B、巴音布鲁克天鹅国家级自然保护区C、喀纳斯自然保护区...
Saturday, December 2, 2023
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