RC JJ 8: 補充-它說地球上的隕石(meteor)都是天上的小行星(asteroid)撞擊後的碎片所造成的. 地球上的隕石都有某種成分(granite 什麼的)所以為了尋找這些隕石的來源,科學家利用光譜(spectrum)來分析在 Mars & Jupitor 中間的隕石帶有沒有這種成分，後來發現它們都沒有。這時候文章提出了兩種解說。第一種是傳統的解說，說那些有這些光譜特性的隕石太小了，看不到。第二種說法是因為這些特別的成分，必須經過特殊的太空風化作用(space-weathering)才會產生，這個道理可以用來解釋某部份月球表面所經過太空風化作用的岩石會反射出紅光的現象。
RC JJ 19
RC JJ 28: 補充-這個猿猴化石是在某個島上找到的。這種species的猿猴化石應該早在不知道幾十萬年前應該就不存在了，而新找到的這個卻是在壹萬五千年前找到的，這個發現在考古學界是很震驚的。第二段開始形容他們怎麼分類這個發現。最初的分類是分成 Homo-genus. 這個母系是沒錯的。在這個母系之下的子系 Homo sapien 是屬於人類這個支線的。但從外型看來他們頭跟身體的比例卻沒有像人類來的那麼small body(也就是說他們身體站的比例比較大雖然整體上來說很小隻)所以絕對不能歸類於 Homo sapien 這個子系中。第三段首先先把歸類的結論提出，就是他們是從 Homo Erectus 的時候與人類的支系分支了，獨立在小島上發展，而他們的的身形並沒有像人類一樣的演化變大，可能是因為有限的糧食限制了他們的演變，科學家也利用這個證據說明如果人類在糧食不足的情況下，也有可能逐漸變小以減小消耗。
MATH:
新題(我覺得是的):
DS: a,r,c,m all positive int, a^r > c^m? 1) a(c^-1)>1 & a^r > a^m 2) a^r(c^-m) >1
DS: A software retail store purchases 100 games at $30 each. Then n copies were sold at $50 each, and the rest were sold at $x each. The store made a profit of 1500. Is x less than 40? 1) n > 6 2) n < 8
DS: 12 movie screenings, each screening sold at least 90 tickets. Is the average number of tickets > 100? 1) more than half of the screenings sold at least 110 tickets. 2) 3 screenings sold at least 120 tickets.
DS: In a company with E employees, m of them are male, n out of m are the males that have served the company for over 5 years. What is the percentage of the male employees that have been serving for over 5 years within the company? 1) if an employee is picked at random from the company, the chance of the employee be male is 0.2 2) the chance of picking an employee who has served for over 5 years from the male employees is 0.8.
DS: M & N both 3-digit number, M > N? 1) unit-digit of M is smaller than unit-digit of N 2)hundred-digit of M + unit-digit of M > hundred-digit of N + unit-digit of N
PS: Triangle ABC, place a point E on BC so that ACE is equilaterial & BE=12. The area ACE is 9sqrt(3). What is the area of ABE?
PS: (79/161)*(sqrt(22)-sqrt(18))^2 is closest to? 0,2,4,6,8
PS: The number of employees of a particular department constitutes for 22% of the total number of employees in the company. If the company reruites 2 new employees for every employee in the department ( 他沒有說新增加的人會不會加到 department 裡面，但肯定是會，因為選項沒有小於22%的), what is the new percentage of the number of employees in the department compare to the whole company? 40%,44%,46%...
PS: a1=1, an+1=1+(1/an), a5?
PS
此主题相关图片如下：
[attach]2325[/attach]
BC=8, AB=6, DE=30, AE=?
JJ2 需要澄清一下 就是有 Business Degree & 會講 French 的那題，他最後的問題很 tricky, 他是問 what is the percentage of the people with business degree that can speak French? 他是在問有 Business degree 裡面的人有百分之幾會講 French, 所以答案是 50%.
JJ78 變形: (@a)^2 * @b = even or old? 1) a even 2) b odd
JJ132 變形: 定義不變 I.X#Y=Y#X II.X#0=0 III.X#1=X^2+1 問哪幾個成立。
JJ250 應該是選C 因為平行的 tangent 應該處碰圓的兩點的距離就是直徑，也許有人說如果兩條線可以重疊，但是依我看來重疊的線不算在平行內。
希望這份小小的心意可以幫助到各位學弟學妹們
