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

這樣列式有錯嗎 謝謝🙏🙏🙏

Vieilsp (G) grixsmo enciones (8) MUGU ZU UJO 1210 Ma T on beebgmi afnamsq aid ylim lenodil voy a ni qu Vieuxna helond vlt abreht 2 Teonsulini (6) jucds yea of even sigos sw aseniaud & ainut hot byneb blow ned s to herli 白口紅3 P(3紅不相鄰12黑不相鄰) elbred (8) em (c) subscre =1-P(2黑鄰)-P(3紅鄰)+P(鄰3鄰) pals eari era fud ed blued ener (ROS) blo-16sy-e BAGE 10 rbiw

為什麼會有主動跟被動的區別？比如第一、二個例句為什麼是用主動而第三個例句是用被動？

5 說明 Marionisio noimubing 1 8 15 ditw (CI) be situated in/on/at... gnols (1)本句型為表「位於」。分為主動和被動用法。 (2)主動: prep. via NANY nobring lutil sbs loo lie (A)who sit stand situated 被動:be prep. located + 宇爐 早媛 nieno 174 . The castle sitting on top of an old volcano has an 800-year history. 此位於一座老火山山頂的城堡有800年的歷史。 Standing on the edge of a cliff, the house commands a spectacular view. 這間房子座落在懸崖邊,俯瞰著壯麗的景致。 The restaurant which is located in this small town attracts tens of thousands of food lovers from around the nation each year. 900 這家位在此小鎮上的餐廳每年吸引全國各地數以萬計的美食愛好者。 .noillim sai ono ai levive to soñedo od yhes adinom uol mod ydad s 107

想請問一下這一題 為什麼不能選D

CR (A) are being 7. A typhoon destroyed the A) were wait (C) are to be 4) is being idge to the village; all the residents could (B) were waiting (C) was wait do) (D) was waiting thing that she does every day for help. the house tidy

很急，請問（D）（E）怎麼解釋？

X4. 4.設<an>、<b>、<C>為三實數數列,<a>為收斂數列,且對所有的正整數 n ,an<brCn<a,4)均成立,試選出正確的選項。 (A) lima=lim and n→00 n→00 夾 (B) lima, = lim (b,c,) # n→00 n→00 <b n+1/n+1 (C)PAC)可能是發散書 13. bn > C₁ = (-1)" Iim (bn Cu) = lim (-1 (C)lim(b,cn)=limb.limen V x→08 n→00 n→00 (D) 對所有的正整數, bCn < batCatt (E)存在正整數,使得a> lim an A N→∞ "Astor antl #an 2

請化學高手幫幫我 謝謝🙏

(C\¯]= 1.8x10 0.1 =18x109 = 1,2×105 《例3》:已知AgCl、AgBr、AgI之Ksp依次為1.0×10-10、5×10-13、1.0×10-16,今將1.0×10-3. 莫耳之 NaI,2.0×10-3莫耳之NaBr,3.0×103莫耳之NaCl與4.0×10-3莫耳之AgNO3 與 100mL 水混 合,達平衡時該混合液的敘述何者正確? 4x102 (A)產生AgCl、AgBr、AgI 三種沉澱 (B)[I]=2×108M (C)[Br]=5×10-14 M (D)[C]=2×102M(E)[Ag*]=5×10° M (A)失沉澱Aal→ AR

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.

請問該題的B選項要從文章中何處推斷 ？

master's degree in horticulture in 1896. In the same year, he was invited to head the newly formed department of agriculture at the Tuskegee Institute in Alabama, where he spent the rest of his life. At Tuskegee he slowly built up a laboratory and researched ways to rebuild the exhausted land around the Institute. Carver found that soil which had apparently been ruined by over-cultivation of cotton and tobacco could be restored and that growing peanuts and sweet potatoes also improved the soil. In order to popularize these crops, he developed over 300 by-products, including cereals, oils, dyes, soaps, and new foods. At the same time, he conducted his remarkable school on wheels, a traveling classroom from which he taught Alabama farmers the basics of soil enrichment. When he died on June 5, 1943, he was one of America's most honored scientists, having brought prosperity to large areas of the impoverished South. 9 Which of the following is an accurate statement about Carver's childhood? (A) He was adopted by a man named Carver. (B) His parents died when he was still very young. He was born into a rich farming family in Missouri. D) Despite his youth, he fought to free slaves in the Civil War. 10871

求講解為什麼選D

serious damage. (A) and (B) that (C) which (D), which

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