問題詳情
17如附,一根短磁棒從空中自由落下,恰沿一中空金屬管的中心軸進入管內。當該磁棒下端接近圖中虛線所示的金屬管中心平面時,圖中黑點所示位置(在管壁上)的電流流動情形為下列何者?
(A)電流方向朝上
(B)電流方向朝右
(C)電流方向朝左
(D)無電流
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增
內容推薦
- 關於植物行光合作用，下列何者正確?(A)植物行光合作用的產物可轉換成澱粉(B)植物行光合作用產生的養分由木質部運送(C)植物行光合作用釋出的氧氣主要是來自二氧化碳的分解(D)植物行光合作用的先決
- 有兩包未標示的白色粉末,已知它們分别為葡萄糖與麵粉。下列哪一項實驗最適合用來區分兩者?(A)取適量粉末置於試管，分別加人少量碘液，觀察是否變藍黑色 (B)取適量粉末配成水溶液,分別直接加入少量
- 榕樹莖內維管束含有形成層,不斷增生新的木質部和新的韌皮部,使莖加粗,於是莖內含有:甲.新的質部；乙.老的木質部；丙.新的韌皮部；丁.老的韌皮部。以上構造由外而內排列順序為何?(A)甲→乙→丙→丁
- 關於心臟的敘述，下列何者錯誤?(A)人的心臟分為兩心房兩心室 (B)心臟內有瓣膜,可防止血液逆流(C)心房的血液通往動脈,心室接收靜脈流過來的液(D)心臟的收縮與舒張為血液流動力來源。
- 關於植物蒸散作用的敘述,下列何者不正確?(A)韌皮部負責蒸散作用的進行(B)摘除植物葉片會減緩蒸散作用(C)蒸散作用有助於根部對水分的吸收(D)蒸散作用時,水分移動的方向是由下往上運輸。
- 有關淋巴循環的敘述,何者正確?(A)部分血漿會從微血管滲出稱為淋巴,當淋巴滲入淋血管後，稱為組織液(B)淋巴循環最後注入動脈,回歸血液循環(C)當淋巴流經淋巴結時,其中所含的病原體會被紅血球吞噬(
- ( )附右圖為葉綠體中光合作用的模式圖,請問丙物質應該為下列何者? (A)水(B)二氧化碳(C)氧氣(D)葡萄糖
- 立方體木塊置於均勻場B中,沿四方體周緣釘有導線,電流方向為a→b→d→c→e,如圖所示。忽略電流產生的磁場,則下列各段導線組合中,何者所受磁力大小相同? (A)ab與bd (B)bd與dc(C)
- 關於植物輸導組織的敘述,下列何者正確?(A)木質部運送養分 (B)韌皮部運送水分(C)根向上送水分(D)養分均由上而下運送。
- 下列有關肺循環與體循環的敘述,何者錯誤?(A)肺循環主要是心臟與肺部間的血液循環(B)肺循環與體循環是同時進行的(C)血液循環的動力來自於動脈的搏動 (D)兩循環在心臟交會。
內容推薦
- Mom: Dan, don't you have lots of homework today? How come you are stillplaying video games?
- Vincent was tired, so he _______ outside to play with his friends.(A) wants to go (B) wanted not
- Wayne lost his mind when I had lunch with him at the student reataurant.When we _______ , he made
- The fans of the singer kept _______ their hands, but she didn't even take a look atthem.(A)
- Betty: Hi, Lucy. Would you like to go _______ with me today?Lucy: Sorry, Betty. I plan up my room
- Jen: Your English is good. Could you read this letter to me?Ivy: Sorry, I can't. I'm on
- Cathy hopes _______ Hsich Su-wei (謝淑薇).She keeps _______ tennis after school every day.(A) to li
- Making chocolate cake _______ fun for the students. Each person _______ a great timein the cooki
- 二、克漏字選擇:Edward: Hello, everyone. I'm Edward Lin. Let's welcome Mrs. Smith! Nice to meet yo
- 【題組】(A) always (B) are (C) is(D) being
- 【題組】(A) plays (B) to play(C) playing (D) were playing
- 【題組】(A) playing(B) to play (C)plays (D) were playing
- 【題組】(A) reading(B) to read (D) be reading (C) reads
- Mrs. White: Honey, this Saturday is Aunt Lily's birthday. ___6___Mr. White: Well, I have a meet
- 【題組】(A) because(B) thanks to(C) because of(D) on time
- 【題組】(A) It's a deal. (B)No worries. (C) What's wrong?(D) Best wishes.
- 三、閱讀測驗:My father liked to sayevery day is a new day.He told me I need a dream,a dream that will make
- 【題組】What might be the best title of the poem?(A) My father's dream (B) A dream at night(C) D
- Mrs. Wang: Where's your homework, James?James: I didn't bring it.Mrs. Wang: Why not?James:
- 【題組】How was James' weekend?(A) It was exciting. (B) It was terrible. (C) It was sunny. (D) I
- 【題組】What does Mrs. Wang think about Jame's homework?(A) She doesn't care. (B) She belie
- The Assyrians built bridges for carrying water first, around 700 BC.Three hundred years later, the R
- 下圖中,酵素X之活性與溫度的關係如甲所示,且知酵素X置於超過44℃的環境中,就無法再回復催化的能力。小維在試管中加入30mL 具有活性的酵素X,並將此試管置於可調控溫度的裝置中,其溫度隨時間控制
- 【題組】What does the word "agueduct" mean?(A) Bridges for carrying water.(B) Roads in Rome
- 【題組】According to the reading, now we may NOT see aqueducts in _____. (A) France (B) South Africa