請問DE

鳳動手試試 在標準溫壓下,下列何者不進行化學變化? (A)Cul(aq) +F2(9) B)Zn(s) + CuCl2(aq) CZn2(aq) + Co(s) (D)Ag(aq) + CuCl2(aq) (E)NiCl2(aq) + ZnBr2(aq) 閣 CE

想請問這題的第四個選項。我怎麼想都是只有三個交點：（ 以下附上題目與解析，謝謝。

已知f(x) 是一個四次實係數多項式,且f'(x)=0有3個實根a、b、c(a<b<c),f(x)=0有 2個實根dse(d<e),則下列哪些選項是正確的? (1)d<b一定成立 (2)y=f(x)的圖形對稱於直線x=b (3)y=f(x)的圖形在d與b之間凹口向下 (4)當為任意實數,y=f(x)的圖形與直線y-f(c)=m(x-c)最多有三個交點 (5)y=f(x)的圖形在x=d處一定有相對極值

請問為什麼他不用加氧化劑才可發生？

請問19題的CD C為什麼要1.44/2 *33.6？ 1.44/2從哪裡來的？

9. (A) 燃料電池陽極是負極,與電解池負極連接 (B) 電解池中的正極(陽極)反應式: 2OH (aq) Oz(g)+H2O(l)+2e¯ 與燃料電池的陽極反應式H→2H++2e不同 (C) 由 H2O(l) 1/ Oz(g)+Hz(g)知電解 1莫耳的水需2 法拉 第,產生(+1)=1.5 莫耳的氣體,在標準狀況下約共有 3.86×10×60x60 1.5×22.4=33.6公升,又電池提供 =1.44 96500 1.44 法拉第,這段時間內電解池產生的氣體約 ×33.6=24.2 2 公升 100×10% (D)NaOH濃度變為約 =11.5% 1.44 100 - - ×18 2 (E) 電解後 NaOH 水溶液相當電解水,NaOH 濃度上升,pH 值上升

想問CF為何不是？

2)下列各項中,哪一個化學變化需加入還原劑始可發生? 4+ +4+8- 2+ 2- (A) SnCl2 →→SnCl4 (B) KMnO4 → MnSO4 (C) HgO → Hg 2- HF) He 。 (D) MnO2 → MnCl2 (E) K2Cr2O7 → Cr2(SO4)3 (F) HCHO→HCOOH V

求解第19題

The company's best-selling software is an application pronunciation. (A)X (B), which (C)which (D)what can correct users' English the local Learning to speak the language of the country you're about to visit is worth doing, 70 people the impression that you respect their culture. (A)giving (B)gave (C)given (D)gives L

問第11題

Bolz (C)to seeing (D)of seeing My mom was very pleased to see the dishes by my father. (A)do (B)to do (C)done (D)doing Sam never goes swimming without warming up his body first. (A)without (B)to (C) of (D)as 双否定

求解15題

our arrangements. (A)on (B) for (C)about (D)to person doesn't make any difference repeated failure, Joyce never gave up and kept going on. (A)Despite (B)Without (C)Though (D)By The diner finished his lunch, i 1 ! a big tip on his table in appreciation of the good service 16 provided by the waitress. (A) left (B) to leave (C) and leave (D) leaving

求解

ming up his body first. (A)without 双否定 (B)to (C)of (D)as The naughty kids disturbed a nest of bees do it again. (A) of (B) by (C)for (D)with no reason and got stung. They promised to never You can come join us on our trip to the mountains. One person doesn't make any difference our arrangements. (A)on (B)for (C)about (D)to

這一題用的是平均的公式 ε=-ΔΦ/Δt =BAcosθ 請問為什麼 ε=NBAwsin(wt)? 而不是 ε=NBAwcos(wt) 還有分不太清楚什麼時候要用以上公式，什麼時候又要用ε=LvB

E③ 等速旋轉的某交流發電機,自迴線面與磁場垂直開始轉動45°時,其平均應電動勢 為,若再轉動45°後,則在此一象限內之平均應電動勢為何? (A) 2ɛ (B)V2 如右圖 E= NIBA COSONBACO345° (C) & NBA-0 E' = T 4 4NBA = T E (D)(2-2)8 E (E) 2 8 = 2-V2 4NBA (2-2) = A 如右圖所示,甲、乙、丙、丁四個方形 T 3L 2L •