天气预报15天查询> 自然> 鸭的视觉特点

鸭的视觉特点

更新时间: 2021-06-07 14:04:16     

1、野鸭的眼睛视觉非同一般。

2、我们人类的眼睛只能朝前方看,看不见背后的东西,而野鸭却能在不转动脑袋的情况下,既看见前方的东西,又看见左、右、后方的东西。它能看见四周一整圈地平线,还能看见头顶上整个天空中的东西。这种奇妙的视觉,叫做“全景视觉”。

关键词: 视觉 特点

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-364646/ | 耗时:0.4542 s | 内存:1.89 MB | 查询:6 | 缓存读取:4 写入:2 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=364646 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=364646 LIMIT 0,1
SELECT * FROM tbl_categories where CategoryID=90017 LIMIT 0,1
select * from tbl_Articles_sphinx where id=364646 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(771197,388831,660155,3197837,385251,829792,921584,652830,659835,426060,677606,724714,861205,3456939,603820,679036,796396,500712,850082,426118,797947,426977,360000,576917,406613,579880,823332,682757,607787,570210) ORDER BY field (ArticleID,771197,388831,660155,3197837,385251,829792,921584,652830,659835,426060,677606,724714,861205,3456939,603820,679036,796396,500712,850082,426118,797947,426977,360000,576917,406613,579880,823332,682757,607787,570210)
SELECT ArticleID,Title FROM tbl_Articles where CategoryID=90017 ORDER BY ArticleID DESC LIMIT 20