看不太懂這個題組，請問為什麼第四題的答案不是6.3*10^-3/0.005=1260ppm 然後5.的0.1mmol*12*32的12和32怎麼來的？

4.、 5.題為題組 需氧廢料: (甲) 水中汙染物質中有些是動、植物的直接毒素,而大部分是需氧廢料,分解時會降低水中之 溶氧量,進而導致水中生物如魚、蝦的死亡。這些汙染物容易讓細菌繁殖,是汙水呈骯髒 和臭味的主要原因。 (乙)其汙染主要來源為家庭汗水和工廠有機廢水。 (生化需氧量(BOD,Biochemical Oxygen Demand):廢水中所含有機物,為細菌分解時所 需要之耗氧量。 BOD测定方法:先取樣品水溶液,再用純氧溶入樣品水中,使樣品水充滿飽和的氧,並測 此時水樣品的溶氧量Q,然後靜置於暗室,並且保持溫度20℃,經過5天以後,再度測 量水樣品中剩下的溶氧量Q2。從最初的溶氧量Q減去剩餘Q2,再除以溶液體積,並使用 百萬分點計算BOD值。 (1)計算公式如下:BOD= 細菌分解水中有機物所需的耗氧量Q-Q(毫克) 水試樣的體積(升) (2) BOD值愈大表示水質含有機物愈多,即汙染愈嚴重。若水質愈清淨其值應愈小。 (T) 化學需氧量(COD,Chemical Oxygen Demand):將水樣品送往實驗室,在實驗室以化學 方法(強氧化劑,如過錳酸鉀)將水中有機污染物完全氧化,為測定有機汙染程度的指標。 換算成每升水樣品之耗氧重量。 根據上述資料,回答下列問題: 4. 某汙水其中試樣5.0毫升,於20℃時,加入蒸餾水稀釋成100.0毫升,稀釋後通入氧氣使 之飽和,並測得溶氧量濃度為8.3x10-3克/升,維持20℃,且在暗室經5天後,再測此溶 DA. 液溶氧量為2.0×10-3克/升,求此工廠汗水試樣的 BOD 值約為多少 ppm ? (A) 6.3 (B)63 (C) 12.6 (D) 126 (E) 1260 5.某糖廠排放的廢水含蔗糖(C2H22O11) 34.2ppm,則以化學方法完全氧化,此廢水的COD 值預估為多少 ppm? B (A) 3.84 C12Mz201+120→1202+11H20 (B) 38.4 (C) 384 34.2mg 34.2 ppm= 18 (D) 1.92 (E) 19.2 : .34.2m9. 342 7=0.1mmoll

請問第25題為什麼不能選B🙏

of the United 全新試題 建國中學 鳳山高中 ◎第四段課文重點 (B) in show love for others (C) through TV programs. (D) upon 全新試題 (1)介系詞應用 (2)副詞應用 (3)名詞子句 23 23. Studying history (A) likes (B) dislikes traveling in time to the past; we can learn from the past and avoid making the same mistakes. 全新試題 (C) is like (D) is alike and achieve more. 新營高中 (C) farther (D) further (24. I ask you to keep climbing because you will see (A) far D③The 25. The plan change it. (B) fur we expand our business all over Asia sounds risky, so I think we should 全新試題 different (A) that 新試題 III. 綜合測驗 are very ※第一篇 峰高中 高中 (B) which (C) what (D) about which 1. to Established in 1984, TED is a nonprofit foundation that helps spread new ideas around the world. In the beginning, the foundation held conferences and invited thinkers from many different come and speak. Some speakers were experts and researchers in medicine. Others were knowledgeable 2. were highly respected giants in business. Each of them was given eighteen philosophers. minutes to present their ideas. The speakers' talks were filled with valuable and fun insights that often audiences with knowledge 3. entertainment. popular. 4. they did not really start a revolution of

求解

(A) We are expected (C) What is expected (B) It is expected (D) It will expect 2. Last year, the festival attracted many people, and the number of tourists is a peak on the day of the fireworks display. reported (A) that reached (C) to reach (B) to have reached (D) that has reached

請問第四題的D、第五題🙏🏻

40 波的頻率與折射波的頻率相同。 太陽表面在2017年9月接連發生一起被稱作「太陽閃焰」的大型爆發,規模為10年來最大。科學家預計爆發所噴出 的帶電粒子團兩天後抵達地球,撞擊大氣層後產生電磁波,以致影響通訊品質。已知太陽與地球距離約為1.5x1011 公 C尺,光速約為3.0x108公尺/秒。下列敘述哪些正確? 0 (A)電磁波並無繞射與干涉的現象(B)電磁波在空間傳播須以帶電粒子為介質 1.5×103 500 3x68 (C) 電磁波具有隨時間作週期性變動的電場與磁場D 帶電粒子團脫離太陽時的速率約為8.7×105 公尺 / 秒 (E)帶電粒子團撞擊地球大氣層之後約8分鐘,地球上才能觀測到太陽閃焰影像。 折射線 我們常在生活中聽到2.4G無線這樣的名詞,根據美國聯邦通訊委員會(Federal Communications Commission)所定義, 2.4G是指在ISM 頻段中,2.4~2.4835 GHz之間的頻率,完整名稱為 Industrial Scientific Medical Band,是預留給工業、 ·科學及醫療使用的免費頻率,沒有任何使用上的限制。依本文所言,下列敘述哪些正確?(光速c=3x108m/s) (A) 2.4G 中的最長波長約為12.5cm (B)頻率愈大者,其傳播速度愈快 (C)波長愈長者,其傳播速度愈快 (D)只能在地球上傳播(E)可以在太空中使用。 甘零件油左直空中的波長約為300奈米,下列有關此電磁波的敘述,哪些正確? 去完的頻率約為1015 赫茲

2.3.6求講解

1. (D) The old lady sat by the fireplace with her cat (D) 2. ( 13. to lying (C) to lie (D) lying ) The fishing boat moved slowly in the water at (B) in (C) for (D) with 3. (B) This castle appears quietly next to her. (A) lay (B) a large net floating behind it. (A) by dragons. (A) to attack (B) to be attacked (C) to have attacked (D) to have been attacked ) In this game, a person with his or her eyes (C) 4. ( has to spin around several times and then try to pin a tail onto a donkey. (A) cover (B) covering (C) covered (D) to cover a serious fight, but no one 5. (B) Before the accident happened, the couple seems knows the details. (A) having had (B) to have had (C) to have (D) was having Do. (a) Dave can't present the graphs and figures because he seems (A) left (B) leaving (C) to leave (D) to have left his laptop at home.

求解！

18 I left a message to my wife to tell her that I was about to go grocery shopping, and she needed anything from the store, she could call me anytime. (A) as if (B)what if (C)that if Dif Desperate and for no Amanda cried all night because her boyfriend decided to break un with har

求這兩題 我超難理解的 第四題為何✖️1/2呢

15 20 1 5 aln 18 18! 081 5113! 6.初音最近迷上手機遊戲 Candy Crush Saga,遊戲內共有6種形狀的糖果 ●,若5顆相同形狀的糖果連成一線可以形成一顆巧克力球。 今遊戲畫面如右圖,在遊戲進行中會從中間上方隨機落下3顆糖果到黑色 □□□ 方框中,在已知落下的3顆糖果不完全相同的條件下,試求落下的糖果可立即與旁邊4 ● 糖果形成巧克力球的機率為 之。 61 3/31 6×6=20 7.若A,B為獨立事件且P(4)=1 00 主題二 , P(B) = 1,試求P(A∩B)與P(A∩B) O 主題三) B²= 1-3= 7 A = 1-A d AL W15 = 3

想問這樣不行嗎🙇🏻‍♀️🙇🏻‍♀️

yo 3 2 5 3 過的機率分別為二、 乙 0.84 0.16-0.05 0.05 。 18. 如右圖,電路上有4個開關A、B、C、D,各開關電流通 A 4 3 6 5 ,且各開關彼此互不影響, 試求電流從L通過R的機率。 C 3 炒飯 ⇒ D • A → B → D ***5 @ C 7 D 7 + x 8 0 1 2 P = 八 B (A oc) # (人)文 眼 D R

求解第七題為何用ing

S B Cute animal; she's also a symbol of hope for her endangered species. 6. A. truthful C. forgetful # B7. to DA A. to splash C. splashing 8. A. Similar with C. Aside from C9. A. bring an end to C. make the most of 10. A. wildlife A₁ C. privacy B. adorable 可愛的 D. portable 輕便的 B. splashed D. has splashed B. Instead of D. Thanks to 避難所 B. seek refuge in D. reduce the need for I 閱讀能力測驗:閱讀理解 B. border D. consumer H 18

請問這題的C 要怎麼知道是不是均勻的

ANDRO ⑥ 附圖中為雙子葉木本植物的樹幹橫切面之局部 (多選) 放大圖,有關構成甲的細胞敘述,哪些正確? ↓質表 (A)是死細胞 (B)其細胞壁的成分是纖維素和果膠質 (C)細胞壁不均勻加厚 (D)是由形成層分裂所產生的次級構造