關於 market monopoly中文 ，我們在網路上蒐集到這些相關的討論、資訊與評價

就黎暑期啦 (雖然唔知有幾多日放)

大家可以計劃如何善用自己的暑期

下面係簡單介紹我地 YouTube 有關DSE方面有咩睇

升中四、升中五、升中六的朋友

自己搵片睇啦，加油 ^^

數學 Core︰我地有12個 playlist

https://www.youtube.com/user/hyhermanyeung/playlists?view=50&sort=dd&shelf_id=13

大家可由天書A開始睇起

https://www.youtube.com/playlist?list=PLzDe9mOi1K8p2A7HMhwz4udhLJTQt9p2b

大家可以從呢12個 playlist 去學

如果您係無咩睇過的朋友

建議大家睇天書A至G，

呢7個 playlist 已包齊所有DSE會考到的題型

如果想更上一層樓就睇埋其他的 playlist

HKDSE Mathematics 數學天書 訂購詳情及表格:

http://goo.gl/forms/NgqVAfMVB9

___________________________________________

數學 M1︰我地有一個約90小時的 playlist

https://www.youtube.com/playlist?list=PLzDe9mOi1K8q_gw8bjRIfrfaFp00D7PXZ

已經包齊所有 M1 的內容及所有年份的 past paper demo

連埋舊制有用的 past paper demo 都包在內

一般同學的 feedback 係

睇下睇下會發現唔少 past paper 係翻炒

所以每個 section 的後段 pp demo 會快飛

故此，實際睇片的時間大約60小時左右

同學亦可以於 playlist 的 description 中

睇到不同 sub-topic 的 playlist

所以大家可以先學左自己最唔掂的 topic

而片中的筆記係可以免費下載的

___________________________________________

數學M2︰我地有一個約140小時的 playlist

https://www.youtube.com/playlist?list=PLzDe9mOi1K8pnVSla64RHngkdLHCGUFce

已經包齊所有 M2 的內容及所有年份的 past paper demo

連埋舊制有用的 past paper demo 都包在內

如M1，一般同學的 feedback 係

睇下睇下會發現唔少 past paper 係翻炒

所以每個 section 的後段 pp demo 會快飛

故此，實際睇片的時間大約100小時左右

同學亦可以於 playlist 的 description 中

睇到不同 sub-topic 的 playlist

所以大家可以先學左自己最唔掂的 topic

而片中的筆記係可以免費下載的

___________________________________________

Physics 物理︰我地有一個 130 小時的 playlist

https://www.youtube.com/playlist?list=PLzDe9mOi1K8onyKY5YNHBEAUroREi6g_l

內容包括整個 compulsory part 必修部分

及 Elective part 2 : atomic world 原子世界

免費全彩筆記就做到 compulsory part 首3個 topics

___________________________________________

Chemistry 化學︰我地有一個 146 小時的 playlist

https://www.youtube.com/playlist?list=PLzDe9mOi1K8pxOxvVaCYQcTgl4jOOgc5c

內容包括整個 compulsory part 必修部分

已有一本免費下載全彩化學天書供大家下載

___________________________________________

Economics 經濟︰我地有一個148小時的 playlist

https://www.youtube.com/playlist?list=PLzDe9mOi1K8o8H4_PAK1oLM_vhUpd0Xk9

Topic A - Basic Economics Concepts 基本經濟概念 (已完成︰共8小時29分38秒)

Topic B - Firms & Production 廠商與生產 (已完成︰共24小時18秒)

Topic C - Market & Price 市場與價格 (已完成︰共17小時52分37秒)

Topic D - Competition & Market structure 競爭與市場結構 (已完成︰共3小時57分29秒)

Topic E - Efficiency, Equity & the role of government 效率、公平和政府的角色 (已完成︰共13小時16分51秒)

Topic F - Measurement of Economic Performance 經濟表現的量度 (已完成︰共24小時31分4秒)

Topic G - National Income Determination & Price Level 國民收入決定及價格水平 (已完成︰共6小時5分11秒)

Topic H - Money & Banking 貨幣與銀行 (已完成︰共13小時6分23秒)

Topic I - Macroeconomic Problems & Policies 宏觀經濟問題和政策 (已完成︰共13小時5分57秒)

Topic J - International trade & finance 國際貿易和金融 (已完成︰共17小時57分48秒)

Elective 1 - Monopoly, price discrimination, anticompetitive practices 壟斷、價格分歧、反競爭行為 (已完成︰共3小時22分47秒)

Elective 2 - Production Possibilities Frontier, Consumption Possibilities Frontier, HDI 生產可能曲線、消費可能曲線、人類發展指數 (已完成︰共2小時46分39秒)

整個 playlist : 共 148 小時 32 分鐘 42 秒

DSE Economics 背 Definition (中英對照版) (溫書用:共2小時43分鐘49秒)

另有一個專門背 definition / key points 的 playlist

(中英對照版) (純英版) (純中版)

電子書 (中英對照版 - 230頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=ax3kDwAAQBAJ&rdid=book-ax3kDwAAQBAJ&rdot=1&source=gbs_vpt_read&pcampaignid=books_booksearch_viewport
電子書 (純英文版 - 159頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=Xh3kDwAAQBAJ&rdid=book-Xh3kDwAAQBAJ&rdot=1&source=gbs_atb&pcampaignid=books_booksearch_atb
電子書 (純中文版 - 159頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=Yh3kDwAAQBAJ&rdid=book-Yh3kDwAAQBAJ&rdot=1&source=gbs_vpt_read&pcampaignid=books_booksearch_viewport

___________________________________________

BAFS 企會財︰我地有一個 12.5 小時的 playlist

https://www.youtube.com/playlist?list=PLzDe9mOi1K8q6WZM1dAJdTNdLYVtsT6zX

內容包括 compulsory part 和 paper 2B

多年前拍攝，所以涉及的 pp demo 年份不多

___________________________________________

中文︰我地有一個中文口試 - 集體拋橋的 playlist

https://www.youtube.com/playlist?list=PLzDe9mOi1K8pWQWoQ_Dkd2MvFAsyd6DOx

___________________________________________

英文︰我地 English limited company

有一個 newspaper cutting 的 section

睇下大家啱唔啱睇

https://hermanutube.blogspot.com/2020/04/newspaper-cutting-main-page.html

希望我們的 playlist 可以幫助大家於 DSE 再上一層樓，加油﹗

[科技業的護城河]

這篇是講矽谷投資人, 是如何在一堆的新秀中, 挑選可以投資的創新公司.

裡面有提到護城河.不過有些跟"尋找投資護城河"一書提的不太一樣.

我也認為, 研究個股, 尤其是科技相關類股, 除了要看它有沒有先行者優勢(first mover advantage), 也需要注意公司有沒有自己的生態系統, 以及它在更大的生態圈/供應鏈中扮演了甚麼角色.

********
(中文譯稿見此:https://36kr.com/p/5141901)

常見的護城河至少有以上六種：

技術。更好的基礎技術當然是一種護城河。在極端情況下，能夠為客戶帶來利益的新技術可以演化為一種行業標準，你也可以把它理解為一種壟斷，就像英特爾一樣。

生態系統。 YouTube 從內容生產者、分發渠道到內容的託管、保存，建立起了一整套生態系統。類似的，蘋果的 App Store 也有自己的生態。

網絡效應。社交網絡現在已經很好理解了。此外，如果某種按需服務具備了一定的流動性，並且與消費者建立了親密關係，或者是基本控制了需求或供應方其中一方，也可以算作網絡效應。

產品領導者。像 Salesforce，Workday 和 ServiceNow 這樣的雲服務提供商，搭建了一套完整的解決方案，而且創新速度夠快，產品功能完善，成為其細分行業的領導者，當然也算是一種護城河。

渠道。尤其是對於 to B 產品來說，能不能在一個企業內部流通，既是一個挑戰，也是一種優勢
********

原文寫的比較仔細, 轉貼在下方: https://news.greylock.com/what-do-i-look-for-in-a-pitch-866355bddb3

We love to talk about “network effects” in Silicon Valley, but many believe that starts and end with the social, viral growth of Facebook. But network effects can build many kinds of moats that defend them against copycats and price erosion.

I don’t describe every kind of moat here (e.g., regulatory) and many great companies will have new types of moats — ones yet to be invented. No moat is absolute or permanent or I’d be out of a job! Still, having a thesis on your defensibility is essential, even at the Series A.

--Tech. We continue to believe in new and better fundamental technology as a moat — not so much patents or legal protection, but products that are hard to build well or take advantage of a fundamentally new approach. In extreme cases, a technology advantage that translates into a customer benefit can turn into a standard — an effective monopoly — as in the case of Intel. In most cases, even a great technology moat only gets you far enough to become a market leader, buying you the right to work closely with customers and enabling you to define the market.

--Ecosystem moats come in many flavors — from becoming the default hosting site for user-generated video content (YouTube), to the rapid, developer-driven free adoption of container technologies and growth of associated tooling (Docker), to the developers that now make >$20B a year through the Apple app store.

--Networks. Social networks are now pretty well-understood. Marketplaces and on-demand businesses reach a liquidity point (even a local one) and build mindshare with consumers that becomes hard to displace. Often, marketplaces have some advantaged acquisition strategy for at least one side (demand or supply) — they’ve built a community, offered a compelling new service, have organic or viral spread.

--Product leaders. In the enterprise, cloud pioneers like Salesforce, Workday and ServiceNow built complete, core workflow solutions with a new architecture. Their faster-innovating products, (at that time novel) SaaS consumption model, and dominant go-to-market machines have made them category leaders. Each is now expanding their initial moats to become platforms for other applications and workflows.

--Distribution represents a new generation of user-adopted SaaS products. End-user engagement within organizations is often a weak spot for enterprise software incumbents. Deploying software is a challenge for most organizations, and consumers who are using more software in their own lives expect better choice and usability. Simplicity and quality of design has become a moat, especially when coupled with product features that encourage adoption within an organization, or new layers of value for incremental users within an organization. Is it better for me if my team also uses a tool? What about my manager?

Capturing a unique dataset is also emerging as a moat in the age of AI-powered products. If your workflow product or MVP is useful on its own, and you can use it to collect unique data, you can then learn from that data to build a better and smarter product, improving the user experience — driving a new virtuous cycle.

Note download 筆記下載 : https://hermanutube.blogspot.hk/2016/01/youtube-pdf.html
------------------------------------------------------------------------------
Economics 所有 videos 的 Playlist 可看： https://www.youtube.com/playlist?list=PLzDe9mOi1K8o8H4_PAK1oLM_vhUpd0Xk9
分類的 Playlist 可看：
A. Basic Economics Concepts 基本經濟概念 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qqV5XGkWjbTy23XwkqNE0I
B. Firms & Production 廠商與生產 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qrlkuI1wdJUa3UZs0txvjN
C. Market & Price 市場與價格 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8oOWHDRwYI8hvuUhNp9qcQk
D. Competition & Market structure 競爭與市場結構 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8q982crii7XomNNjIx-f8rd
E. Efficiency, Equity & the role of government 效率、公平和政府的角色 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8onmTnt7Dghh4pVud9e3PPU
F. Measurement of Economic Performance 經濟表現的量度 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qIHKIc6pUHUIfTXc3Cmjv3
G. National Income Determination & Price Level 國民收入決定及價格水平 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8pkBABdTOtjs_8aPoTdUf61
H. Money & Banking 貨幣與銀行 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8oFN6Fe_5aEk0mnJpfBe0S1
I. Macroeconomic Problems & Policies 宏觀經濟問題和政策 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8onndGtdUUvNQpcmax7a1VX
J. International trade & finance 國際貿易和金融 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8poqrVsbrWDq5V2-ZsNAwBi
E1. Elective I : Monopoly Pricing, Anti-competitive Behaviours and Competition Policy 壟斷定價、反競爭行為及競爭政策 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8r5Fz1mXcELz7CQ79Omr6nb
E2. Elective II: Extension of Trade Theory, Economic Growth and Development 貿易理論之延伸、經濟增長及發展 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8pesBkw164n1FW0G_UwoiT0
Notes Only Version : https://www.youtube.com/playlist?list=PLzDe9mOi1K8pTsr5jwcpqD4fcPTQZetR8

Definition 背誦︰
中英對照︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8ohGrOAWAsVQK3PFBqrXf2V
純英版︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8pFSFPWu1LJvURZujQzVJvD
純中版︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8odYV54ZMTkj2m7BWvMU9pB
電子書 (中英對照版 - 230頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=ax3kDwAAQBAJ&rdid=book-ax3kDwAAQBAJ&rdot=1&source=gbs_vpt_read&pcampaignid=books_booksearch_viewport
電子書 (純英文版 - 159頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=Xh3kDwAAQBAJ&rdid=book-Xh3kDwAAQBAJ&rdot=1&source=gbs_atb&pcampaignid=books_booksearch_atb
電子書 (純中文版 - 159頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=Yh3kDwAAQBAJ&rdid=book-Yh3kDwAAQBAJ&rdot=1&source=gbs_vpt_read&pcampaignid=books_booksearch_viewport
_______________________________________________
HKDSE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8rq7kTVAuDerVqrfT6WstsV
HKCEE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8oVtFNEdJIya9ANc1X5nhTw
HKALE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8pXFnsqOlPtL3DtsDsb7w4l
------------------------------------------------------------------------------
Please subscribe 請訂閱 :
https://www.youtube.com/hermanyeung?sub_confirmation=1
------------------------------------------------------------------------------
HKDSE Mathematics 數學天書 訂購表格及方法︰
http://goo.gl/forms/NgqVAfMVB9
------------------------------------------------------------------------------
Blogger : https://goo.gl/SBmVOO
Facebook : https://www.facebook.com/hy.page
YouTube: https://www.youtube.com/HermanYeung
------------------------------------------------------------------------------

Note download 筆記下載 : https://hermanutube.blogspot.hk/2016/01/youtube-pdf.html
------------------------------------------------------------------------------
Economics 所有 videos 的 Playlist 可看： https://www.youtube.com/playlist?list=PLzDe9mOi1K8o8H4_PAK1oLM_vhUpd0Xk9
分類的 Playlist 可看：
A. Basic Economics Concepts 基本經濟概念 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qqV5XGkWjbTy23XwkqNE0I
B. Firms & Production 廠商與生產 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qrlkuI1wdJUa3UZs0txvjN
C. Market & Price 市場與價格 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8oOWHDRwYI8hvuUhNp9qcQk
D. Competition & Market structure 競爭與市場結構 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8q982crii7XomNNjIx-f8rd
E. Efficiency, Equity & the role of government 效率、公平和政府的角色 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8onmTnt7Dghh4pVud9e3PPU
F. Measurement of Economic Performance 經濟表現的量度 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qIHKIc6pUHUIfTXc3Cmjv3
G. National Income Determination & Price Level 國民收入決定及價格水平 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8pkBABdTOtjs_8aPoTdUf61
H. Money & Banking 貨幣與銀行 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8oFN6Fe_5aEk0mnJpfBe0S1
I. Macroeconomic Problems & Policies 宏觀經濟問題和政策 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8onndGtdUUvNQpcmax7a1VX
J. International trade & finance 國際貿易和金融 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8poqrVsbrWDq5V2-ZsNAwBi
E1. Elective I : Monopoly Pricing, Anti-competitive Behaviours and Competition Policy 壟斷定價、反競爭行為及競爭政策 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8r5Fz1mXcELz7CQ79Omr6nb
E2. Elective II: Extension of Trade Theory, Economic Growth and Development 貿易理論之延伸、經濟增長及發展 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8pesBkw164n1FW0G_UwoiT0
Notes Only Version : https://www.youtube.com/playlist?list=PLzDe9mOi1K8pTsr5jwcpqD4fcPTQZetR8

Definition 背誦︰
中英對照︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8ohGrOAWAsVQK3PFBqrXf2V
純英版︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8pFSFPWu1LJvURZujQzVJvD
純中版︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8odYV54ZMTkj2m7BWvMU9pB
電子書 (中英對照版 - 230頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=ax3kDwAAQBAJ&rdid=book-ax3kDwAAQBAJ&rdot=1&source=gbs_vpt_read&pcampaignid=books_booksearch_viewport
電子書 (純英文版 - 159頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=Xh3kDwAAQBAJ&rdid=book-Xh3kDwAAQBAJ&rdot=1&source=gbs_atb&pcampaignid=books_booksearch_atb
電子書 (純中文版 - 159頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=Yh3kDwAAQBAJ&rdid=book-Yh3kDwAAQBAJ&rdot=1&source=gbs_vpt_read&pcampaignid=books_booksearch_viewport
_______________________________________________
HKDSE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8rq7kTVAuDerVqrfT6WstsV
HKCEE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8oVtFNEdJIya9ANc1X5nhTw
HKALE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8pXFnsqOlPtL3DtsDsb7w4l
------------------------------------------------------------------------------
Please subscribe 請訂閱 :
https://www.youtube.com/hermanyeung?sub_confirmation=1
------------------------------------------------------------------------------
HKDSE Mathematics 數學天書 訂購表格及方法︰
http://goo.gl/forms/NgqVAfMVB9
------------------------------------------------------------------------------
Blogger : https://goo.gl/SBmVOO
Facebook : https://www.facebook.com/hy.page
YouTube: https://www.youtube.com/HermanYeung
------------------------------------------------------------------------------

Note download 筆記下載 : https://hermanutube.blogspot.hk/2016/01/youtube-pdf.html
------------------------------------------------------------------------------
Economics 所有 videos 的 Playlist 可看： https://www.youtube.com/playlist?list=PLzDe9mOi1K8o8H4_PAK1oLM_vhUpd0Xk9
分類的 Playlist 可看：
A. Basic Economics Concepts 基本經濟概念 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qqV5XGkWjbTy23XwkqNE0I
B. Firms & Production 廠商與生產 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qrlkuI1wdJUa3UZs0txvjN
C. Market & Price 市場與價格 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8oOWHDRwYI8hvuUhNp9qcQk
D. Competition & Market structure 競爭與市場結構 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8q982crii7XomNNjIx-f8rd
E. Efficiency, Equity & the role of government 效率、公平和政府的角色 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8onmTnt7Dghh4pVud9e3PPU
F. Measurement of Economic Performance 經濟表現的量度 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8qIHKIc6pUHUIfTXc3Cmjv3
G. National Income Determination & Price Level 國民收入決定及價格水平 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8pkBABdTOtjs_8aPoTdUf61
H. Money & Banking 貨幣與銀行 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8oFN6Fe_5aEk0mnJpfBe0S1
I. Macroeconomic Problems & Policies 宏觀經濟問題和政策 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8onndGtdUUvNQpcmax7a1VX
J. International trade & finance 國際貿易和金融 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8poqrVsbrWDq5V2-ZsNAwBi
E1. Elective I : Monopoly Pricing, Anti-competitive Behaviours and Competition Policy 壟斷定價、反競爭行為及競爭政策 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8r5Fz1mXcELz7CQ79Omr6nb
E2. Elective II: Extension of Trade Theory, Economic Growth and Development 貿易理論之延伸、經濟增長及發展 … https://www.youtube.com/playlist?list=PLzDe9mOi1K8pesBkw164n1FW0G_UwoiT0
Notes Only Version : https://www.youtube.com/playlist?list=PLzDe9mOi1K8pTsr5jwcpqD4fcPTQZetR8

Definition 背誦︰
中英對照︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8ohGrOAWAsVQK3PFBqrXf2V
純英版︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8pFSFPWu1LJvURZujQzVJvD
純中版︰ https://www.youtube.com/playlist?list=PLzDe9mOi1K8odYV54ZMTkj2m7BWvMU9pB
電子書 (中英對照版 - 230頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=ax3kDwAAQBAJ&rdid=book-ax3kDwAAQBAJ&rdot=1&source=gbs_vpt_read&pcampaignid=books_booksearch_viewport
電子書 (純英文版 - 159頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=Xh3kDwAAQBAJ&rdid=book-Xh3kDwAAQBAJ&rdot=1&source=gbs_atb&pcampaignid=books_booksearch_atb
電子書 (純中文版 - 159頁) (HK$19.90)︰
https://play.google.com/store/books/details?id=Yh3kDwAAQBAJ&rdid=book-Yh3kDwAAQBAJ&rdot=1&source=gbs_vpt_read&pcampaignid=books_booksearch_viewport
_______________________________________________
HKDSE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8rq7kTVAuDerVqrfT6WstsV
HKCEE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8oVtFNEdJIya9ANc1X5nhTw
HKALE Econ Past Paper Solution : https://www.youtube.com/playlist?list=PLzDe9mOi1K8pXFnsqOlPtL3DtsDsb7w4l
------------------------------------------------------------------------------
Please subscribe 請訂閱 :
https://www.youtube.com/hermanyeung?sub_confirmation=1
------------------------------------------------------------------------------
HKDSE Mathematics 數學天書 訂購表格及方法︰
http://goo.gl/forms/NgqVAfMVB9
------------------------------------------------------------------------------
Blogger : https://goo.gl/SBmVOO
Facebook : https://www.facebook.com/hy.page
YouTube: https://www.youtube.com/HermanYeung
------------------------------------------------------------------------------