What's New
1.支持iOS 12;
2.丰富更多内容。
App Description
*****传播知识、普及科学 上知天文 下知地理 百科知识大全 本应用给力推荐
-----《百科知识大全-健康/动物/军事/人体/天文/地理/信息/科技》
-----内容丰富涵盖了:营养健康、 动物世界, 军事交通, 人体的奥秘, 天文地理, 信息科,技 你身边的科技等方面;
=====举例:
为什么乘地铁时耳朵不发胀
列车驶入隧道后,人的耳朵往往会发胀,这与坐索道车或乘公共汽车上高山,或乘飞机起飞、着陆时的感觉相似。
人们所以会产生这种感觉,是由于空气压力的急剧增加或降低所造成的。
高速飞驰的列车驶入隧道,隧道内的空气受到挤压,气压便会增高,接着便压迫了耳朵里的鼓膜,使人感到耳朵发胀。
而在地铁里,由于人的身体始终都是处在一定空气的压力中,即使电车飞驰着,也不足以引起空气压力的变化,所以耳朵没有什么感觉。
尽管如此,如果你稍加注意,会发现当地铁电车紧急刹车时,耳朵同样会感到发胀。
App Changes
- May 11, 2015 Initial release
- May 12, 2015 Price decrease: $1.99 -> FREE!
- May 14, 2015 Price increase: FREE! -> $1.99
- June 01, 2015 Price decrease: $1.99 -> $0.99
- June 13, 2015 Price increase: $0.99 -> $1.99
- July 03, 2015 Price decrease: $1.99 -> $0.99
- July 21, 2015 New version 8.3.99
- July 22, 2015 Price decrease: $0.99 -> FREE!
- July 29, 2015 Price increase: FREE! -> $1.99
- September 07, 2015 Price decrease: $1.99 -> FREE!
- September 08, 2015 Price increase: FREE! -> $1.99
- September 27, 2015 Price decrease: $1.99 -> FREE!
- September 28, 2015 Price increase: FREE! -> $1.99
- October 22, 2015 New version 9.0.1
- December 21, 2015 Price decrease: $1.99 -> FREE!
- December 21, 2015 Price increase: FREE! -> $1.99
- January 26, 2016 Price decrease: $1.99 -> FREE!
- January 28, 2016 Price increase: FREE! -> $1.99
- November 19, 2019 Price increase: $1.99 -> $2.99
- July 15, 2020 Price decrease: $2.99 -> $1.99
- September 16, 2023 New version 14.4