這張應該是 舊草嶺隧道 北口

因為 「制天險」題字，我認為應該是 舊草嶺隧道 北口。

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原始連結：台北工專五年(66~71年):

照片標題：「67年4月(一下)於宜蘭→台北火車上所攝：三貂嶺車站外的擎天石柱」

Brain exercises, samples found on the Web

I plan to do some of the following exercises, for my own brain!

Exercises to train brain capabilities
5 Daily Brain Exercises - AskMen

1. Memory
2. Attention
3. Language
4. Visual-spatial skills
5. Executive function

Fun Brain Teasers

Captured on http://brainden.com/

Body exercises good for brain
Wake Up / Brain Balancing Exercise | Gibson Coaching

Learned: 2.1 speaker + 2 more speakers = 4.1 speaker system?

So, "2.1 + 2 != 4.1" !

By TheCorm

2.1 + 2 would be 4.1 but the rear speakers obviously would have less bass because they don't have the benfit of a subwoofer.

Therefore in EAX enabled games, an explosion in front of you will have much more of a "BOOM" than explosions behind you.

Original Page:

2.1 speaker setup 2 more speakers = 4.1 speaker system? - AnandTech Forums

回想作兵的日子中！

The first Web server: It is only 20 years ago!

 August 6, 2011 is the 20th anniversary of public Web service. According to Wiki:

Wiki: World Wide Web

... On August 6, 1991, he posted a short summary of the World Wide Web project on the alt.hypertext newsgroup.^[11]This date also marked the debut of the Web as a publicly available service on the Internet.

That is, in 1980's and before, it would be really difficult for people to imagine today's daily tools such as Portals, Directories, Search Engines, Wikis, and Social Networks.

Only 20 years! Amazing!

The world will surely evolve faster and faster. What would the world become 20 years later?! I cannot wait to see it!