第1題為什麼是D?謝謝

1( 選擇 ( bas I'm going on a vacation, so my pet cat will (A) take care (B) take care of 6 bego by my sister. (C) be taken care 2. (D) I'm really sorry. All of the tickets to the concerts (A) booked (B) have booked (C) were booking (D) be taken care (D) have been bo since last year? (C) been visiting B: Over a million (D) to be visited (B) have thrown (C) were thrown (D) were throwin :(B) A: How many times has this web page * (A) visited (B) been visited (C) Tracy is crying because her toys MN) threw away.

為什麼第7格只能填in不能填on?(感謝

painting was purchased by the French government in 1831 and has been hanging in th Louvre Museum since 1874. 4., Delacroix's painting has become one of the mos famous symbols of the July Revolution and the French love of freedom. Jib F 3., this did n also the year Linc According t Delacroix's painting shows ordinary French citizens who are charging and 5. him a long time their guns at the soldiers of King Charles X. In front of these brave people is the figure of Shockingly, jus 6. the enem in 1865, he was fearless female freedom fighter. Her dress is torn, so her bare breasts 7. her left hand is a gun, and in her right is the future French flag. This is Libertas, the his wife. goddess of liberty. She is leading the French citizens in their fight for freedom in the Jul Revolution. 期 皇冠 The 8. duration of this revolution was but 72 hours. By the Without Americans al influence acr 9. of the 9. presi "Three Glorious* Days," the fighters had taken back their precious freedom from the kin 10. the unjust and greedy king had lost his crown, the people of France no longer ha to suffer under his cruel rule. Liberty had led them to a better, freer future. 註:tribute 致敬 July Revolution 法國七月革命 duration 期間 glorious 榮耀的 註:Gettysbum 1. A (B) to celebrate (C) celebrated 6. (D) celebrating

問問5、7 怎麼使用間接問句

5. A: I'm not sure B: My favorite TV program will start at five. 6. A: Do you remember who is Jerry's grandmoth B: Yes, the old lady is Jerry's grandmother. 7. A: Can you tell me B: Yes, it's a quarter to five.

我想請問第一題 為什麼不能是(B)的被動式 那(C)的repairing可以變名詞嗎？ expensive形容詞後面接名詞

Are 33 a. Nowadays, cellphones have become a necessity in our lives. However, like other manufactured goods, they can be expensive (1) when broken. Considering how fragile some cellphones can be, they are usually used for a short period of time before being discarded without a second thought. They are also replaced as soon as new models become available. These factors have huge environmental consequences, which can only be effectively (2) by recycling. 因 完被 Ith 丟棄。 (3) has been repeatedly proven that tossing away unused electronics 再被證明 丟棄 不用の 電子產品 harms the environment. When burned or buried, the metal, plastics, and the 燒 掩埋 chemicals in cellphones release (4) pollutants into the land, water, and 釋放 污染物 +441 air. Once they're in the environment, they could cause serious damage to plants, animals, and eventually us. Furthermore, the resources needed to produce cellphones are obtained through mining, deforestation, and 採礦 砍森林 industrialization, all of which destroy the environment. 工業化 破采 These problems can be avoided (5) we recycle unwanted cellphones. Hopefully, by using recycled materials, we can better protect Mother Nature 但原願 in the age of consumer electronics. 材料 C2 De 2. (A) clustered 1. (A) to repairing (B) repaired (C) to repair (D) repairing ✓ 3. (A) This (B) bargained (B) So (C) recovered (D) addressed 處理 (C) It (D) Such BA 4. (A) pacific (B) toxic. (C) frantic (D) civic DB. 5. (A) as if (B) now that (C) in case (D) only if 21

請問這題如何判斷

2)、「利用假日到郊外走走, 於大自然的懷抱,洗滌俗慮,必能感到□□□□. 上列缺空的文字,依序填入何者才恰當? (A)徜徉,心曠神怡 (B)依偎,喜氣洋洋 (C)落實,香沁心脾 (D)置身,心領神會 -204. J GOOD TIME 六 MITSUBISHI UM-151 極細·耐水性·颜料 JAPAN PENCIL CO. LTD 49 02778 035409 (A)財迷心敫 AB (B)與虎謀皮 50

這種題型怎麼算

右聲納之聲波自發射至接收的時間為1.5秒,則海底的深度為多少公尺? (A)1000 Deep= (B)1125 (C) 2000 (D)2250。 zx time xv=750x1.5=1125 3. ( ) 20℃時聲音在空氣中速度為340m/s,某人站於兩山壁間發出一聲音,隔0.6 秒 聽到第一次回聲,再隔1秒聽到第二次回聲,則兩山壁相距? (A)544m (B) 1088 m (C)272 m (D)374m 。 而下的潛艇發出頻率為30000赫的超聲波,經

A和D在想

(B) 4 秒 2 x Time X A(D) (C)6秒(D)8秒 3. 探測船在探測海洋深度時,意外發現海底古城遺跡,經電腦 生活素養題 100 200 300 400 500 600 處理相關資訊後,古城輪廓繪製結果如右圖所示。當時探勘 船等速向西行駛,每隔100公尺探測一次,試問當初測得聲 納回聲所需時間資料,應為下列何者? (A) 東 西 (B) 距離(公尺) 100 200 300 400 500 600 測得回聲的 時間(秒) 距離(公尺) 100 200 300 400 500 600| 測得回聲的 50 40 60 20 20 50 0 40 10 60 60 0 時間(秒) (C) (D) 已以 距離(公尺) 100 200 300 400 500 600 距離(公尺) 100 200 300 400 500 600| 可 測得回聲的 測得回聲的 50 30 10 70 70 50 50 40 50 10 10 50 時間(秒) 時間(秒)

求解謝謝

基礎學力題 BKA ) 1 15°C時聲音在空氣中速率為340m/s,某人站於兩山壁間發出一聲音,隔0.6秒影 第一次回聲,再隔1秒聽到第二次回聲,則兩山壁相距多少? (A)272m (B)374m (C) 544m (D) 1088m x = 17 340 P 1b594 1001209 248 (1) 2 船上用聲納去測量海底的深度時,若聲納之聲波自發射至接收的時間為3秒,測出 底的深度為2250 公尺,請問海水中聲音傳播的平均速率為多少公尺/秒? (A) 340 (C) 1500 (B) 750 (D) 2250 >>50=-=-=2×3× √ 121/2V = 2250, V = 15m x V, (B)3 小兔去看電影,她發現電影院的牆壁凹凸不平,而且地板也鋪滿了絨布地毯,請 種設計的功能為何? (A)加強聲音的反射(B)防止回聲干擾 (B)步 (C) (D) 10.起 ( (B) 1(C)擴大音量 (B) 4. (D)加快聲速 (B) 975m BA (C) 1020m (D) 1065m (A) 1 (B) 2 Z 5. 如右圖所示,小新在兩座牆壁之間敲擊音叉,則他所聽 到的第一個回聲與第二個回聲間相距多少秒?(假設當 時聲速為300m/s) 8-740x6 =2040 已知聲速為 340m/s,某船停於山壁前,鳴放汽笛同時以15m/s的速度等速駛離山 壁,6秒後聽到山壁傳來的回聲,試求船鳴放汽笛的位置與山壁間的距離為何? (A) 930m 1020-45:975 75x6 21020 x=2=45 300 m 600 m 2 (C)3(D)4 (A) 回 100x 27750 x 0.04-70 ) 6.漁夫在海上捕魚時,常使用可接收及發射超聲波的儀器,從海面向著正下方的海底探 測魚群的狀況。假設在海水中超聲波的傳播速率為1500m/s,則下列敘述何者正確? (A)發射超聲波 0.04 秒後傳回某魚群的訊息,該魚群約在海面下30m處 久(A)

為什麼這時積分變數t變換為τ時，積分範圍不會改變呢

例題1-7: Given a function f(t) and its Laplace transform F(s), what is the Laplace transform of the delayed version of f(t) by 2>0 units of time, i.e., f(t−2)? You must give a +b(1) proof of your answer. 解 根據拉氏轉換的定義,F(s)=L[f(t)]=ff(t)e="d,所以 【85 中興電機】 [ƒ (1-2)] = f(t−2) e™ dt = f(t-2)e(-) d(-2) -2s 【大專告 201 0 0 C-TER -λs (a)D -ST =eft-)e-d(1-2) = e | f(t)e dt = eF(s) 0

想問這題怎麼算

28. A trough is 6 m long and its ends have the shape of isos- celes triangles that are 1 m across at the top and have a height of 50 cm. If the trough is being filled with water at a rate of 1.2 m³/min, how fast is the water level rising when the water is 30 centimeters deep? goal: dh dt