【題目】為判斷線圈繞向,可將靈敏電流計(jì)G與線圈L連接,如圖所示。已知線圈由a端開(kāi)始繞至b端;當(dāng)電流從電流計(jì)G左端流入時(shí),指針向左偏轉(zhuǎn)。
(1)將磁鐵N極向下從線圈上方豎直插入L時(shí),發(fā)現(xiàn)指針向左偏轉(zhuǎn)。俯視線圈,其繞向?yàn)?/span>_____(選填“順時(shí)針”或“逆時(shí)針”)。
(2)當(dāng)條形磁鐵從圖中的虛線位置向右遠(yuǎn)離L時(shí),指針向右偏轉(zhuǎn)。俯視線圈,其繞向?yàn)?/span>______(選填“順時(shí)針”或“逆時(shí)針”)。
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科目:高中地理 來(lái)源: 題型:
【題目】 短文改錯(cuò)(共10小題;每小題l分,滿分10分)
假定英語(yǔ)課上老師要求同桌之間交換修改作文,請(qǐng)你修改你同桌寫(xiě)的以下作文。文中共有10處語(yǔ)言錯(cuò)誤,每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。
增加:在缺詞處加一個(gè)漏字符號(hào)(∧),并在其下面寫(xiě)出該加的詞。
刪除:把多余的詞用斜線(\)劃掉。
修改:在錯(cuò)的詞下劃一橫線,并在該詞下面寫(xiě)出修改后的詞。
注意:
1. 每處錯(cuò)誤及其修改均僅限一詞;
2. 只允許修改10處,多者(從第11處起)不計(jì)分。
Last Sunday, my father go to see a film. But in our surprise, he came back soon. He told us about the funny thing what had happened. He was sitting in his seat while a woman came to her and said the seat was hers. So they looked at their tickets careful, only to find the seats were the same while the color were different. After while, my father apologized to the woman, saying, "Sorry, I make a mistake." The fact was that his ticket found out under the glass on his desk was for the film a month ago.
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科目:高中地理 來(lái)源: 題型:
【題目】如圖甲所示是一個(gè)簡(jiǎn)單的多用電表的電路原理圖。
(1)當(dāng)閉合開(kāi)關(guān)________,斷開(kāi)開(kāi)關(guān)________,可作電流表用;
(2)當(dāng)閉合開(kāi)關(guān)________,斷開(kāi)開(kāi)關(guān)________,可作電壓表用;
(3)當(dāng)閉合開(kāi)關(guān)________,斷開(kāi)開(kāi)關(guān)________,可作歐姆表用;
(4)某個(gè)多用電表的面板如圖乙所示,若表頭滿偏電流為1mA,內(nèi)阻為1kΩ,所用電池的電動(dòng)勢(shì)為1.5V,內(nèi)阻為0.5Ω,使用歐姆×1擋,若把多用電表的黑紅表筆短接時(shí),表針恰好指在電流滿刻度處,則此時(shí)歐姆表的內(nèi)電阻值為_(kāi)_______。A、C、E刻度處對(duì)應(yīng)的電阻值分別是________、________、________。
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科目:高中地理 來(lái)源: 題型:
【題目】六、短文改錯(cuò)
假定英語(yǔ)課上老師要求同桌之間交換修改作文,請(qǐng)你修改你同桌寫(xiě)的以下作文。文中共有10處語(yǔ)言錯(cuò)誤,每句中最多有兩處。錯(cuò)誤涉及一個(gè)單詞的增加、刪除或修改。
增加:在缺詞處加一個(gè)漏詞符號(hào)(∧),并在其下面寫(xiě)出該加的詞。
刪除:把多余的詞用斜線(\)劃掉。
修改:在錯(cuò)的詞下劃一橫線,并在該詞下面寫(xiě)出修改后的詞。
注意:
1. 每處錯(cuò)誤及其修改均僅限一詞;
2. 只允許修改10處,多者(從第11處起)不計(jì)分。
Last Sunday, I sat at my favorite table in a restaurant and wait for the food I had ordered to arrive. Suddenly I found that Lin Ling, one of my classmate, worked like a waitress there. Honest speaking, it was great surprise for me to find her working there. As far as I know, she’s from a richer family. What was it that made her to work there? I walked up to her and asked her the reason. When asking, she said, "I just want to earn some pocket money so that we can help some children in poor areas go back to school. " "How a good girl!" I should learn from her.
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科目:高中地理 來(lái)源: 題型:
【題目】如圖所示是研究電磁感應(yīng)現(xiàn)象實(shí)驗(yàn)所需的器材,用實(shí)線將帶有鐵芯的線圈A、電源、滑動(dòng)變阻器和開(kāi)關(guān)連接成原線圈回路,將小量程電流表和線圈B連接成副線圈回路,并列舉出在實(shí)驗(yàn)中通過(guò)改變副線圈回路磁通量,使副線圈回路產(chǎn)生感應(yīng)電流的三種方法:
(1)_________________________________________________;
(2)_________________________________________________;
(3)_________________________________________________。
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科目:高中地理 來(lái)源: 題型:
【題目】短文改錯(cuò)
假定英語(yǔ)課上老師要求同桌之間交換修改作文,請(qǐng)你修改你同桌寫(xiě)的以下作文。文中共有10處語(yǔ)言錯(cuò)誤,每句中最多有兩處。錯(cuò)誤涉及一個(gè)單詞的增加、刪除或修改。
增加:在缺詞處加一個(gè)漏詞符號(hào)(∧),并在其下面寫(xiě)出該加的詞。
刪除:把多余的詞用斜線(\)劃掉。
修改:在錯(cuò)的詞下劃一橫線,并在該詞下面寫(xiě)出修改后的詞。
注意:
1. 每處錯(cuò)誤及其修改均僅限一詞;
2. 只允許修改10處,多者(從第11處起)不計(jì)分。
In the past, I always think my little brother was very unpleasant, because he used to ask me some questions every time he did his homeworks. I felt as if I had been the smartest person in the world every time he accepted my explanations. Answered one of his questions, I often liked to say that he was too stupidly to solve such simple questions.
Last week both us received our report cards from our school. Unexpectedly, I got C’s, when he got straight A’s. To make things bad, all the day my brother screamed what foolish it was of me not to ask questions! I just sighed and had to admit that she was right. I have never made a fun of him since then.
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科目:高中地理 來(lái)源: 題型:
【題目】一種半導(dǎo)體材料稱為“霍爾材料”,用它制成的元件稱為“霍爾元件”,這種材料有可定向移動(dòng)的電荷,稱為“載流子”,每個(gè)載流子的電荷量大小為1個(gè)元電荷量,即q=1.6×10-19 C,霍爾元件在自動(dòng)檢測(cè)、控制領(lǐng)域得到廣泛應(yīng)用,如錄像機(jī)中用來(lái)測(cè)量錄像磁鼓的轉(zhuǎn)速、電梯中用來(lái)檢測(cè)電梯門(mén)是否關(guān)閉以及自動(dòng)控制升降電動(dòng)機(jī)的電源的通斷等。在一次實(shí)驗(yàn)中,一塊霍爾材料制成的薄片寬AB=1.0×10-2m、長(zhǎng)BC=4.0×10-2m、厚h=1×10-3m,水平放置在豎直方向上的磁感應(yīng)強(qiáng)度B=1.5 T的勻強(qiáng)磁場(chǎng)中,BC方向通有I=3.0 A的電流,如圖所示,沿寬度產(chǎn)生1.0×10-5 V的橫向電壓。
(1)假定載流子是電子,A、B兩端中哪端電勢(shì)較高?
(2)薄板中形成電流I的載流子定向運(yùn)動(dòng)的速率多大?
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科目:高中地理 來(lái)源: 題型:
【題目】如圖所示是使用光電管的原理圖,當(dāng)頻率為ν的可見(jiàn)光照射到陰極K上時(shí),電流表中有電流通過(guò)。
(1)當(dāng)變阻器的滑動(dòng)端P向________滑動(dòng)時(shí)(填“左”或”右”),通過(guò)電流表的電流將會(huì)增大。
(2)當(dāng)電流表電流剛減小到零時(shí),電壓表的讀數(shù)為U,則光電子的最大初動(dòng)能為_(kāi)_______(已知電子電荷量為e)。
(3)如果不改變?nèi)肷涔獾念l率,而增加入射光的強(qiáng)度,則光電子的最大初動(dòng)能將________(填“增加”“減小”或“不變”)。
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科目:高中地理 來(lái)源: 題型:
【題目】如圖所示是示波器的原理示意圖,電子經(jīng)電壓為的加速電場(chǎng)加速后,進(jìn)入電壓為的偏轉(zhuǎn)電場(chǎng),離開(kāi)偏轉(zhuǎn)電場(chǎng)后打在熒光屏上的P點(diǎn)。P點(diǎn)與O點(diǎn)的距離叫偏轉(zhuǎn)距離。要提高示波器的靈敏度(即單位偏轉(zhuǎn)電壓引起的偏轉(zhuǎn)距離),應(yīng)采用下列辦法中可行的是
A.提高加速電壓
B.增加偏轉(zhuǎn)極板a、b的長(zhǎng)度
C.增大偏轉(zhuǎn)極板與熒光屏的距離
D.減小偏轉(zhuǎn)極板間的距離
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