想請教第三題，只寫的出反應式

2. 汙水中的需氧廢料在氧化時會消耗水中的溶氧,影響水中生物的生存。在一定的條件下, 將汙水試樣稀釋後,使用過量的過錳酸鉀(KMnO4)或二鉻酸鉀(KCO-)等化學藥劑 與汙水試樣充分反應,再以硫酸銨亞鐵溶液滴定上述過量的化學藥劑,即可測得汙水試樣 所消耗的化學藥劑用量。將化學藥劑的用量轉換為相對應的氧氣量,即為汙水試樣中所含 需氧廢料完全氧化時所會消耗的氧氣量,稱為此汙水試樣的化學需氧量(Chemical Oxygen Demand,簡稱COD)。COD為測定水污染程度的重要指標之一,常用ppm表示,即每1 公升汙水試樣所含需氧廢料完全氧化時所消耗的氧氣毫克數。 (1)測量COD時,為何需要稀釋汙水試樣?(1分) CROS (2)加入過錳酸鉀或二鉻酸鉀的用途為何?(1分) (3)若5.0mL的汙水試樣需消耗0.08mmole(毫莫耳)的二鉻酸鉀,才能使需氧廢料完全氧 化,則此汙水試樣的化學需氧量為若干ppm?(2分,需寫出算式) 2 3+ K Cr ₂017 - - 2 Cv³ (be-35) 10³ mol 0222H20(4e-轉) 3,000:1 1 45 Satak 50 140 30 將編 值) 為作

這邊come on是什麼意思？

B hat a small world! 6. Kimi: Do you want to play volleyball with us this Saturday? Betty: I'd like to, but I can't play volleyball. Kimi: I'll teach you. YA Of course! (B) Come on! Are you sure? (D) No way!

請問7的A哪裡錯了？🙋

(B) 5. Gal likes her mom to push her back while she is playing on the (A) slide (C) seesaw (B) swing (D) machine his new business on Fish Island; he likes the fresh My cousin is thinking it he Dair there, but he is afraid he can't make enough money to raise his family. ipob (A) has started (B) starts zorltspot vagedas will start as the team leader? Wendy: It Bo (C) was going to start (C) Drew: Do you know (A) who will our teacher pick may our teacher will pick (C) who will be picked (C) 8. Sean: Excuse me. May I ask where who is picking our teacher the tickets to the basketball game on Saturday? Rick: At any bookstore. Or, you can also get them online. (A) can buy (B) they are bought (C) to buy (D) buying (w (CD) be Jane.

6. 7.

(A) that (B) whom 6. Be prepared and listen to me. We have (A) another (B) each 7. It is not wise that you always give your son (B) which (A) that (C) which 3) 8. I know the man and the dog (A) who (B) that (C) next (D) X problems. (D) other he wants. (C) what (D) X are standing at the bus stop (C) which (D) X

第11題🙏🙏

11. 小叡身上有一些5元硬幣和 10 元硬幣,買零食花掉了a個5元硬幣,玩寶可夢機台花掉了b個 10 元硬幣,若小叡共花掉了偶數個硬幣,花掉的總錢數為奇數,關於a和b的敘述,何者正確? 2偶r2奇 (A) a為奇數,b 為奇數。 (B) a為偶數,b 為偶數。 (C) a為奇數,b 為偶數。 (Q) a為偶數,b 為奇數。 7 atb=偶 Satlob= 第2 頁,共5 頁

請問27的B選項

子吃。 是一座 包月的 三代 的島 ** -招号 Firen 25. What does Zack mean when he says. "It's not rocket science"? (A) Finishing a science report is easy. (B) Deciding on a gift is not that difficult. (C) He is smarter than Shelly and Karen. (D) Getting some good sleep is very important. (26~28) EJReading Listen to Books Are your eyes tired after you work in front of the computer for hours? Do you want to read, but your eyes really need a rest? Don't worry. We read for you. A book on EJReading only costs 3 to 15 dollars, and you can listen to it as many times as you want. What's more, with EJReading, you don't need to carry a book around. You can listen to different audiobooks anytime and anywhere on your cellphone. Book of the Month For this book, there are 4 choices: Michael Davis Michael Davis reads the story word by word in a warm voice. Ann Lee Ann Lee reads the story vividly. It's like you're $3.99 watching a movie when you listen to her. James Williams James Williams tells you the key points of each chapter and helps you get the big picture of the Word by Word Behind the Word The Trip to Lucerne By Lewis Anderson (2015) -Lewis Anderson's most famous book. -A book to change your life story. Kate Green Through looking at each character closely and explaining their actions, Kate Green helps us take a deeper look into the story. She also shares her opinions of the story with us. $3.99 $6.99 $8.99 1 : : ABOD * $10 for a Word by Word and a Behind the Word. * Place your order by June 30 to get a $5 gift card. ABOD audiobook character # vividly 1 chapter opinion & 26. Who would most likely use EJReading? likely T (A) Jessica. She is a teacher. She loves reading and often goes to the library. (B) Mandy. She is a student. She studies hard, but she hates reading in her free time. (C) Mike. He is an engineer. He loves reading, but his eyes are too tired after work. (D) Ethan. He is a cook. He enjoys listening to different songs when he's at work. ABCD 27. What CAN'T we learn from the web page of EJReading? web page (A) There are about 10,000 audiobooks for people to choose from on EJReading. (B) It costs less than 5 dollars to listen to Ann Lee read The Trip to Lucerne. (C) The Trip to Lucerne is Lewis Anderson's most famous book. (D) If you want to listen to someone share his / her ideas about The Trip to Lucerne, you can pick Kate Green. 28. Nancy read The Trip to Lucerne after it was on the market in 2015. In a study group next Saturday, she wants to share her thoughts on the story with everyone. However, although she really loves the story, she still forgets some parts of it She doesn't need to listen to every word again, and she already has her own ideas about the story.) To help herself remember the important points in some chapters in a short time, which might she choose? thought (A) Word by Word-Michael Davis. (B) Word by Word-Ann Lee. (C) Behind the Word-James Williams. (D) Behind the Word-Kate Green. cup of life

求解🙏

in this town. man 500 e theme jobs change 口 (28~30) Dear Bacon, When we first met on the street, you were small and sweet. Every weekend, we jogged together in the morning. We also played baseball in the park. I threw the ball and you caught it. At night, you sat beside me when I did my homework. Before I went to bed, you always gave me a good night kiss. I felt lucky to have you with me. However, a year later, everything changed. You have grown too big and become very strong. Jogging with you is dangerous. You often dash and pull me into the trees. When we play in the park, you always bite other kids and dogs. At night, you bark a lot. Also, at home, you break every piece of glass and scratch the sofa. You're tearing the house apart. Tomorrow I mus take you to Dr. Jones. I know he looks serious, but my parents and I believe he will turn you into a good dog. So have sweet dreams tonight. Love you, Jimmy dash bark scratch B 28. Where did Jimmy first meet Bacon? (A) In a shop. (B) On a street. (C) In a park. (D) At Jimmy's school. 29. Which is true about Dr. Jones' job? (A) Training dogs to be better. (B) Teaching parents to play with kids. (C) Helping dogs to dream and sleep well. (D) Teaching people to play baseball with others. 30. What can we learn from this letter? (0) (A) Jimmy bought Bacon from Dr. Jones. (B) Jimmy went jogging with Bacon only on Mondays. (C) Jimmy broke all the windows of his house. (D) Bacon barks a lot at night. buy blago tear... apart T'hob 10.1

有人能教我這題嗎

【題組】同學們一起到水上樂園遊玩,園中有高度相同、斜度 不同的滑水道,阿康、小軒選擇甲滑水道,沛沛選擇 乙滑水道,如右圖所示,請回答下列問題: ( ) 8.已知阿康、小軒、沛沛的體重不同,三人分別從 甲乙 靜止開始滑下滑水道,若忽略摩擦力,則哪位同學的看法正確? (A)阿康:因為兩座滑水道的高度相同,所以我們溜下來之前的重力位能相同 (B)小軒:因為力學能守恆的緣故,所以我們溜到底下時的動能也會相同 (C)沛沛:因為我選的滑水道坡度較陡,所以我溜到底下時的動能一定最大 (D)以上三人的說法皆錯誤。 sath

求解

。 (x-1)(x+1) X*X-X-1 x-1=x+4=X-3x+1. 2011年12FX-1 x X=11 4. 如右圖,第二象限内有P、Q兩點, 原點O與P、Q2在同一直線上。若 OP:PQ=2:3,且Q-10,15), 則P點坐標為 sat 325 15 34 L3 Q(-10,15) 2 P 10.0 找 5. 市政府舉辦城市美觀設計比賽,校園組前三名獎金分 配為7:3:2。若第三名比第一名少4000元,則第 # MOO

為什麼不能選A ?? 國二英文

Job C 6. Rita : Alan and Kate late for the meeting last Saturday? Lily: No, they lang an (A) Did; didn't (C) Were; weren't C (B) Was; wasn't (D) Do; don't 95617 BIO 6m), snignĄ 6) gif] Part # GOGOGO 閱讀素養