請問為什麼觀察者與聲源接近但頻率不變，謝謝

類 靜置不動的鬧鈴振動頻率,今有一觀察者正對鬧鈴等速度接 題近中,在此人未抵達鬧鈴位置之前,其所聽到的聲音頻率f與 時間t的關係,應為下列何圖? (A) (B) 品 胜 fo AB 132 | 單元4|電與磁的統一 fo SP 惠理 (C) t fo E t (D) fo ......... NETGEA (E) fo

第一題求解謝謝

7. 試求下列級數和: (1) 1 x 1 + 2 x 3 + 3 x 5 + ... ... + 29 x 57 + 30 x 59 = (+ + +. (2) 11² + 122 + 132 + ... +592 + 60° = 1342 + 。 十、、 = o NET ICHI +2/2+1) + 31 3+2) + 29 (29+28) + 30130 39 (29+28) = (1 +1+12 +2 +3 + 6) + (29* + 812) + (31 = 1 (P + 2 + 3 tout 30 ) + (1+246 + - + 870) (1 2

為什麼b不可以

C applied D inspired 106. One of the main reasons pe ple attend conferences is for the opportunities A grec B. partnering X C networking D. programming D

請問這題為什麼這樣列式跟為什麼他們等於1？謝謝

1 * lim x, 1191 - 2 n-> + ....... ... + +n 1 1 + ? n2+1 Vn+ 2 中 11 十 tnt! time +) LXnZ {) n7 tr in²th * In’en ++ inth n Exis 1 1 2 1 un tn = 1? n lim =lim 日人 lim X n =) ntoo nooo ntn no net

40題為什麼選C

還 wi 上eg 補全史 sarlly true-. 蝦 (A) being etter caregivers than men) not neces (B)to be - 38. We'd better not ft (c) are D) 1S Si orm 妥5 any fixed ideas about an individual 人0 parttcular 宮oVb. 39. Crime is limited 號 (C) fallen Dto ta ee lte 品 (A) So 331 is talernt lirmnmited to amy group. 廬.避 4 With littlef 喇 (Cor Dineiner 卻 中人全 ittle food 和 關議ed ___,many victims relied on mud cakes to keep thems frornhunger. IVeQ On 計計 (B)living on (ctolive on Dibeing tvew ow 五、閱讀測驗 (10%) society, eVYe tougn W (金髮) in the Armerlcan There is a strange_obsession with blonde ha and are usualy knowWn 3S are tought to be neither intelligent nor possessed of cormmon sense blondes. A preference for red and blond however, the associatio Mediterraneam, Medieval Europe. At 了at time, most of the upper-class had dark hair and W ple, Who WaS consideredtobe less Smartt. Fair hair was frequently se dumb blonde jok i ink between blonde air and stpidiY.、l Vund oman performing ehair can be traced_back to the ancient Rorme, Greece, ts because she did not Today, <Essex Giru a Working-ClaSS show a blonde W odd or dangerous 反7 K versl0n of te “durmb blonde”is the consedquences. The U xo NET 3 GI GIGVET 和 MOT1.22101 0

31.32.35.36.38.39.40 求解析~

9 009 31. (A)becomes (of ot 三、綜合; (D)m case Wi下兮 Te seventeenth Gf March, 志e fime he retired ji County D guess his early ori y honors St. Patrick, the Irish patron saint who preacheq CrstGtansey- Sy own, JreJand, St. Patrick 3 T_known as amodest and religious man. 32 ,ftew wouuw became a slave 和m Treland gins. Born Maewyn im 385 A:D. 崗 Wales, he was kidnapped by Irish marauders at the age of 16. Hie to Britain. Where he began to have religious dreams. Then he managed to escape and boarded aship going Once free, he moved to France ad calling-一 . Joined a monastery. Studying for 了e priesthood,。 he realized his holy 33 peopie to Christianity. He also chaii ed his 品四 af (meaning co Y % fHnme. Around 432 A.D., he returned to Jreland 3 rd 婚 2 his true putpGsehe8 一二一 and to saving the salvation ofsouls. He used a and fhe Spirit together “father of his people?) during this d himself to sharing the Word of God stem of shamrock _35 the trinity一the concept of the Father the Son, Nowadays St. Pafrickss Day is asecular holiday. People can still rermember St. Patrick green clothes as fhey sip green beer and wear (B)became (gfhas become (9yhad beceome 9@% -悶 32. (A)Moreover (B)However (C)Instead 人9yThus 2 33. (A)converfing (B)adopting (Craiding (D)pinching 34. (A)Discovered (B)Discovering (C)To discover (D)Havimng diseovered 急 人@: (aught (B)teaching, (Cto teach (D)to teaching ofhow we can help ourselves and others to become happier. 有 光和4 Taught by Ben-Shahar befween 2004 and 2008, the primary focus ofthis unique and innovativi 9 和和 ecourse is fhe question 店 仙人人 人 :螞條臣斑 才 詞查閃:明和 尖 牙 多此加 細擴信和 才3! 者紅 導 品品,、 個瘋

求解

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