題目:八顆球, 其中有一重量比較重, 用天平秤二次來找出那顆球
Situation 1:
先拿六顆稱, 一邊各三顆 若等重,
則將剩下的二顆 , 再秤.
看那裡比較重
Situation 2:
先拿六顆稱, 一邊各三顆 若不等重,
把比較重的三顆那一邊.
再拿二顆來秤
a:若相等, 則是手上那顆是比較重的
b:若不相等, 則是天平上較重的那一顆
2007年8月2日
2007年7月28日
A Must Read for All.....Who have children or grandchildren
EVERYONE NEEDS TO READ ALL OF THIS & HAVE YOUR CHILDREN READ IT TOO!
After tossing her books on the sofa, she decided to grab a snack and get on-line . She logged on under her screen name By Angel 213. She checked her Buddy List and saw GoTo123 was on.
She sent him an instant message:
By Angel 213:
Hi. I'm glad you are on! I thought someone was following me home today. It was really weird!
GoTo123:
LOL You watch too much TV. Why would someone be following you? Don't you live in a safe
neighborhood?
By Angel 213:
Of course I do. LOL I guess it was my imagination cuz' I didn't see anybody when I looked out.
GoTo123:
Unless you gave your name out on-line.
You haven't done that have you?
By Angel 213:
Of course not. I'm not stupid you know.
GoTo123:
Did you have a softball game after school today?
By Angel 213:
Yes and we won!!
GoTo123:
That's great! Who did you play?
By Angel 213:We played the Hornets. LOL. Their uniforms are so gross! They look like bees. LOL
GoTo123:
What is your team called?
By Angel 213:
We are the Canton Cats. We have tiger paws on our uniforms. They are really cool.
GoTo123:
Did you pitch?
By Angel 213:
No I play second base. I got to go. My homework has to be done before my parents get home. I don't want them mad at me. Bye!
GoTo123:
Catch you later. Bye
Meanwhile...GoTo123 went to the member menu and began to search for her profile. When it came up, he highlighted it and printed it out. He took out a penand began to write down what he knew about Angel so far.
Her name: Shannon
Birthday: Jan. 3, 1985
Age: 13
State where she lived: North Carolina
Hobbies: softball, chorus, skating & going to the mall. Besides this information, he knew she lived in Canton because she had just told him. He knew she stayed by herself until 6:30 p.m. every afternoon until her parents came home from work. He knew she played softball on Thursday afternoons on the school team, and the team was named the Canton Cats.
Her favorite number 7 was printed on her jersey.
He knew she was in the eighth grade at the Canton Jr. High School . She had told him all this in the conversations they had on- line. He had enough information to find her now.
Shannon didn't tell her parents about the incident on the way home from the ballpark that day. She didn't want them to make a scene & stop her from walking home from the softball games. Parents were always overreacting & hers were the worst. It made her wish she was not an only child. Maybe if she had brothers & sisters, her parents wouldn't be so overprotective.
By Thursday, Shannon had forgotten about the footsteps following her. Her game was in full swing when suddenly she felt someone staring at her. It was then that the memory came back. She glanced up from her second base position to see a man watching her closely.
He was leaning against the fence behind first base & he smiled when she looked at him. He didn't look scary and she quickly dismissed the sudden fear she had felt.
After the game, he sat on a bleacher while she talked to the coach. She noticed his smile once again as she walked past him. He nodded & she smiled back. He noticed her name on the back of her shirt. He knew he had found her.
Quietly, he walked a safe distance behind her. It was only a few blocks to Shannon 's home, & once he saw where she lived he quickly returned to the park to get his car .
Now he had to wait. He decided to get a bite to eat until the time came to go to Shannon 's house. He drove to a fast food restaurant and sat there until time to make his move.
Shannon was in her room later that evening when she heard voices in the living room.
"Shannon, come here," her father called. He sounded upset & she couldn't imagine why. She went into the room to see ! the man from the ballpark sitting on the sofa.
"Sit down," her father began, "this man has just told us a most interesting story about you."
Shannon sat back. How could he tell her parents anything?
She had never seen him before today!
"Do you know who I am, Shannon ?" the man asked.
"No," Shannon answered.
"I am a police officer and your online friend, GoTo123."
Shannon was stunned. "That's impossible!
GoTo123 is a kid my age! He's 14. And he lives in Michigan !"
The man smiled. "I know I told you all that, but it wasn't true.
You see, Shannon , there are people on-line who pretend to be kids; I was one of them. But while others do it to injure kids & hurt them, I belong to a group of parents who do it to protect kids from predators. I came here to find you to teach you how dangerous it is to talk to people on-line. You told me enough about yourself to make it easy for me to find you. You named
the school you went to, the name of your ball team and the position you played. The number and name on your jersey just made finding you a breeze."
Shannon was stunned. "You mean you don't live in Michigan ?"
He laughed. "No, I live in Raleigh . It made you feel safe to think I was so far away, didn't it?"
She nodded.
"I had a friend whose daughter was like you. Only she wasn't as lucky. The guy found her & murdered her while she was home alone. Kids are taught not to tell anyone when they are
alone, yet they do it all the time on-line. The wrong people trick you into giving out information a little here and there on-line.
Before you know it, you have told them enough for them to find you without even realizing you have done it. I hope you've learned a lesson from this and won't do it again. Tell others about
this so they will be safe too?"
"It's a promise!"
That night Shannon and her Dad and Mom all knelt down together and thanked God for protecting Shannon from what could have been a tragic situation.
After tossing her books on the sofa, she decided to grab a snack and get on-line . She logged on under her screen name By Angel 213. She checked her Buddy List and saw GoTo123 was on.
She sent him an instant message:
By Angel 213:
Hi. I'm glad you are on! I thought someone was following me home today. It was really weird!
GoTo123:
LOL You watch too much TV. Why would someone be following you? Don't you live in a safe
neighborhood?
By Angel 213:
Of course I do. LOL I guess it was my imagination cuz' I didn't see anybody when I looked out.
GoTo123:
Unless you gave your name out on-line.
You haven't done that have you?
By Angel 213:
Of course not. I'm not stupid you know.
GoTo123:
Did you have a softball game after school today?
By Angel 213:
Yes and we won!!
GoTo123:
That's great! Who did you play?
By Angel 213:We played the Hornets. LOL. Their uniforms are so gross! They look like bees. LOL
GoTo123:
What is your team called?
By Angel 213:
We are the Canton Cats. We have tiger paws on our uniforms. They are really cool.
GoTo123:
Did you pitch?
By Angel 213:
No I play second base. I got to go. My homework has to be done before my parents get home. I don't want them mad at me. Bye!
GoTo123:
Catch you later. Bye
Meanwhile...GoTo123 went to the member menu and began to search for her profile. When it came up, he highlighted it and printed it out. He took out a penand began to write down what he knew about Angel so far.
Her name: Shannon
Birthday: Jan. 3, 1985
Age: 13
State where she lived: North Carolina
Hobbies: softball, chorus, skating & going to the mall. Besides this information, he knew she lived in Canton because she had just told him. He knew she stayed by herself until 6:30 p.m. every afternoon until her parents came home from work. He knew she played softball on Thursday afternoons on the school team, and the team was named the Canton Cats.
Her favorite number 7 was printed on her jersey.
He knew she was in the eighth grade at the Canton Jr. High School . She had told him all this in the conversations they had on- line. He had enough information to find her now.
Shannon didn't tell her parents about the incident on the way home from the ballpark that day. She didn't want them to make a scene & stop her from walking home from the softball games. Parents were always overreacting & hers were the worst. It made her wish she was not an only child. Maybe if she had brothers & sisters, her parents wouldn't be so overprotective.
By Thursday, Shannon had forgotten about the footsteps following her. Her game was in full swing when suddenly she felt someone staring at her. It was then that the memory came back. She glanced up from her second base position to see a man watching her closely.
He was leaning against the fence behind first base & he smiled when she looked at him. He didn't look scary and she quickly dismissed the sudden fear she had felt.
After the game, he sat on a bleacher while she talked to the coach. She noticed his smile once again as she walked past him. He nodded & she smiled back. He noticed her name on the back of her shirt. He knew he had found her.
Quietly, he walked a safe distance behind her. It was only a few blocks to Shannon 's home, & once he saw where she lived he quickly returned to the park to get his car .
Now he had to wait. He decided to get a bite to eat until the time came to go to Shannon 's house. He drove to a fast food restaurant and sat there until time to make his move.
Shannon was in her room later that evening when she heard voices in the living room.
"Shannon, come here," her father called. He sounded upset & she couldn't imagine why. She went into the room to see ! the man from the ballpark sitting on the sofa.
"Sit down," her father began, "this man has just told us a most interesting story about you."
Shannon sat back. How could he tell her parents anything?
She had never seen him before today!
"Do you know who I am, Shannon ?" the man asked.
"No," Shannon answered.
"I am a police officer and your online friend, GoTo123."
Shannon was stunned. "That's impossible!
GoTo123 is a kid my age! He's 14. And he lives in Michigan !"
The man smiled. "I know I told you all that, but it wasn't true.
You see, Shannon , there are people on-line who pretend to be kids; I was one of them. But while others do it to injure kids & hurt them, I belong to a group of parents who do it to protect kids from predators. I came here to find you to teach you how dangerous it is to talk to people on-line. You told me enough about yourself to make it easy for me to find you. You named
the school you went to, the name of your ball team and the position you played. The number and name on your jersey just made finding you a breeze."
Shannon was stunned. "You mean you don't live in Michigan ?"
He laughed. "No, I live in Raleigh . It made you feel safe to think I was so far away, didn't it?"
She nodded.
"I had a friend whose daughter was like you. Only she wasn't as lucky. The guy found her & murdered her while she was home alone. Kids are taught not to tell anyone when they are
alone, yet they do it all the time on-line. The wrong people trick you into giving out information a little here and there on-line.
Before you know it, you have told them enough for them to find you without even realizing you have done it. I hope you've learned a lesson from this and won't do it again. Tell others about
this so they will be safe too?"
"It's a promise!"
That night Shannon and her Dad and Mom all knelt down together and thanked God for protecting Shannon from what could have been a tragic situation.
2007年5月23日
Gmail and iGoogle
just found out this and make me think ...ya really gmail is good to use
oh and by the way the new iGoogle is also easy way to use
oh and by the way the new iGoogle is also easy way to use
2007年4月16日
2007年4月7日
全球暖化 聯合國發警訊 13年後亞洲嚴重缺水
聯合國「政府間氣候變化專門委員會」（ＩＰＣＣ）今天在比利時首都布魯塞爾舉行的會議中，通過一份極為重要的「決策者摘要」，對人類排放溫室氣體導致的全球暖化效應發出極為嚴峻的警訊，並認為貧窮國家及窮人將蒙受最嚴重的衝擊。
這份《影響、適應性與脆弱性》報告指出，如果人類無法遏阻或延緩全球暖化效應，將導致三○％動植物物種面臨滅絕危機、氣候型態劇烈轉變、水旱災風險大幅上升、水資源日趨枯竭、饑荒與傳染病大行其道等危機，而且全球沒有一個大陸可以置身事外。
貧國受到最嚴重打擊
ＩＰＣＣ主席帕喬瑞說：「面對這種氣候變化，貧窮人民最為脆弱，也將遭到最嚴重的打擊。這個問題是國際社會的責任。」第二工作組共同主席培瑞也在日前指出，全球有四類地區受到的衝擊最為顯著：北極地區、撒哈拉沙漠以南的非洲、小型島嶼亞洲的大型三角洲。
非洲的前景最令人憂慮。科學家估計到二○二○年時，非洲約有兩億五千萬人將面臨水資源不足的危機。部分國家的糧食產量會劇跌一半，導致大規模營養不良。某些窮困國家為了因應全球暖化，必須消耗國內生產毛額五％到一0％，根本無力負擔。
長江三角洲將遭洪水
全球人口最多的亞洲也大勢不妙。到二○二○年時，約有一億兩千萬人到十二億人面臨水荒，二○五○年時可能還增加近十億人。海平面上升引發洪水，侵襲長江、恆河、紅河等主要河流人口稠密的三角洲。由於蚊蠅等病媒的棲息地大幅擴張，霍亂與瘧疾將日趨猖獗。一旦全球平均氣溫上升攝氏三度，喜瑪拉雅山區長度在四公里以下的冰川都將消融，造成可怕的洪水與土石流。
此外，許多地區的自然生態都將遭衝擊，歐洲阿爾卑斯山脈的冰川逐漸消失，澳洲西南外海大堡礁珊瑚大量白化，北極海浮冰二一○○年將消融二二％到三三％，北半球永凍層到二○五○年將縮減二○％到三五％。
這份《影響、適應性與脆弱性》報告指出，如果人類無法遏阻或延緩全球暖化效應，將導致三○％動植物物種面臨滅絕危機、氣候型態劇烈轉變、水旱災風險大幅上升、水資源日趨枯竭、饑荒與傳染病大行其道等危機，而且全球沒有一個大陸可以置身事外。
貧國受到最嚴重打擊
ＩＰＣＣ主席帕喬瑞說：「面對這種氣候變化，貧窮人民最為脆弱，也將遭到最嚴重的打擊。這個問題是國際社會的責任。」第二工作組共同主席培瑞也在日前指出，全球有四類地區受到的衝擊最為顯著：北極地區、撒哈拉沙漠以南的非洲、小型島嶼亞洲的大型三角洲。
非洲的前景最令人憂慮。科學家估計到二○二○年時，非洲約有兩億五千萬人將面臨水資源不足的危機。部分國家的糧食產量會劇跌一半，導致大規模營養不良。某些窮困國家為了因應全球暖化，必須消耗國內生產毛額五％到一0％，根本無力負擔。
長江三角洲將遭洪水
全球人口最多的亞洲也大勢不妙。到二○二○年時，約有一億兩千萬人到十二億人面臨水荒，二○五○年時可能還增加近十億人。海平面上升引發洪水，侵襲長江、恆河、紅河等主要河流人口稠密的三角洲。由於蚊蠅等病媒的棲息地大幅擴張，霍亂與瘧疾將日趨猖獗。一旦全球平均氣溫上升攝氏三度，喜瑪拉雅山區長度在四公里以下的冰川都將消融，造成可怕的洪水與土石流。
此外，許多地區的自然生態都將遭衝擊，歐洲阿爾卑斯山脈的冰川逐漸消失，澳洲西南外海大堡礁珊瑚大量白化，北極海浮冰二一○○年將消融二二％到三三％，北半球永凍層到二○五○年將縮減二○％到三五％。
2007年4月4日
防駭客 設定密碼有訣竅
竊取網友密碼，盜用帳號，成為近來駭客常用的入侵電腦手法。資安專家指出，很多網友都會使用自己的生日、電話號碼這類「懶人密碼」，容易遭駭客破解，建議網友可以依不同用途設定至少三組密碼，設定密碼也應該混用英文、數字等多字元組合而成，才不容易被網路駭客破解。
為了防止網路駭客入侵電腦，很多網友都記得要常常更換密碼，但資安專家指出，如果所有密碼都使用同一組，像是用自己的生日、電話號碼等這類「懶人密碼」，不只無法防駭客，還更容易遭人破解。賽門鐵克技術顧問總監王岳忠建議網友，可以依照不同用途，設定容易記憶的三組密碼。他說：『一組就是拿來註冊網頁網站或到處去看的，另外，如果會做線上交易或線上購物就需要另外一組，至於網路銀行或網上證券則再需要一組(密碼)。』
至於密碼如何設定比較安全呢？王岳忠表示，混用英文、數字等多字元組合而成的密碼，才不容易被破解。他說：『密碼強度要夠的話，最少要有八個字母，低於8的話比較容易被猜出來，第二個是說把英文大寫、小寫、阿拉伯數字及特殊符號這四種類型，最好混用其中三種。』
如果網友還是擔心密碼遭竊，專家也建議可以使用「中文詞彙式」密碼，也就是切換成英文輸入法後，卻用注音鍵入中文辭彙，例如「電話」這個詞，用英文輸入法打出來會變成「2u04cj84」看似無意義的亂碼，可提高密碼的安全性。
為了防止網路駭客入侵電腦，很多網友都記得要常常更換密碼，但資安專家指出，如果所有密碼都使用同一組，像是用自己的生日、電話號碼等這類「懶人密碼」，不只無法防駭客，還更容易遭人破解。賽門鐵克技術顧問總監王岳忠建議網友，可以依照不同用途，設定容易記憶的三組密碼。他說：『一組就是拿來註冊網頁網站或到處去看的，另外，如果會做線上交易或線上購物就需要另外一組，至於網路銀行或網上證券則再需要一組(密碼)。』
至於密碼如何設定比較安全呢？王岳忠表示，混用英文、數字等多字元組合而成的密碼，才不容易被破解。他說：『密碼強度要夠的話，最少要有八個字母，低於8的話比較容易被猜出來，第二個是說把英文大寫、小寫、阿拉伯數字及特殊符號這四種類型，最好混用其中三種。』
如果網友還是擔心密碼遭竊，專家也建議可以使用「中文詞彙式」密碼，也就是切換成英文輸入法後，卻用注音鍵入中文辭彙，例如「電話」這個詞，用英文輸入法打出來會變成「2u04cj84」看似無意義的亂碼，可提高密碼的安全性。
誰在MSN封鎖你？ 釣魚網站竊資料
很多網友都想知道誰在MSN(網路通訊軟體)封鎖你，網路上也流傳一個名為「get-messenger」的網站，號稱只要輸入自己MSN的帳號及密碼，即可查出哪位聯絡人，把你封鎖。不過，台灣微軟表示，目前還沒有方法或工具，可以查尋聯絡人有沒有封鎖MSN帳號，聲稱有此功能大多是釣魚網站，網友千萬別受騙上當。
網路上用MSN聊天這種趨勢越來越普遍，即使是在虛擬世界，但還是有網友想知道聯絡人是不是把自己封鎖。現在網路盛傳一個名為「get- messenger」的網站（http://www.get-messenger.com），網友只要輸入自己MSN的帳號及密碼，就可以查出哪位聯絡人，把你封鎖。不過，這個聽起來很方便、實用的網站，經台灣微軟公司證實，其實是釣魚網站，目的是要竊取網友的MSN帳號、密碼，甚至會把病毒寄送給 MSN的聯絡人。台灣微軟MSN行銷經理鍾婉珍說：『這個網站很明顯是一個釣魚網站，就是要取得你的帳號以及密碼，那假如有用戶不小心輸入了帳號及密碼，建議趕快到MSN的網站上面去把密碼改掉，以免有人竊取到之後，拿你的帳號去做其它的事情。』
擔心有網友不小心連上釣魚網站，MSN微軟總部已經把「get-messenger」網站的相關字、網址全都封鎖；微軟強調，目前還沒有任何方法或工具，可以查尋聯絡人有沒有封鎖MSN帳號，呼籲網友不要受騙上當。
網路上用MSN聊天這種趨勢越來越普遍，即使是在虛擬世界，但還是有網友想知道聯絡人是不是把自己封鎖。現在網路盛傳一個名為「get- messenger」的網站（http://www.get-messenger.com），網友只要輸入自己MSN的帳號及密碼，就可以查出哪位聯絡人，把你封鎖。不過，這個聽起來很方便、實用的網站，經台灣微軟公司證實，其實是釣魚網站，目的是要竊取網友的MSN帳號、密碼，甚至會把病毒寄送給 MSN的聯絡人。台灣微軟MSN行銷經理鍾婉珍說：『這個網站很明顯是一個釣魚網站，就是要取得你的帳號以及密碼，那假如有用戶不小心輸入了帳號及密碼，建議趕快到MSN的網站上面去把密碼改掉，以免有人竊取到之後，拿你的帳號去做其它的事情。』
擔心有網友不小心連上釣魚網站，MSN微軟總部已經把「get-messenger」網站的相關字、網址全都封鎖；微軟強調，目前還沒有任何方法或工具，可以查尋聯絡人有沒有封鎖MSN帳號，呼籲網友不要受騙上當。
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