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精美的听课笔记 学习中大家需要思考的问题: 比较磁平衡式霍尔电流传感器与电磁式电流互感器的异同点 1、简述磁电感应式传感器的工作原理。磁电感应式传感器有哪几种类型? 2、某些磁电式速度传感器中线圈骨架为什么采用铝骨架? 3、何谓磁电式速度传感器的线圈磁场效应,如何补偿? 4、为什么磁电感应式传感器在工作频率较高时的灵敏度,会随频率增加而下降? 5、变磁通式传感器有哪些优缺点? 6、什么是霍尔效应?霍尔式传感器有哪些特点? 7、试说明霍尔式位移传感器的输出UH与位移x成正比关系。 8、霍尔式速度传感器和磁电感应式速度传感器相比,各有哪些特点。
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【简答题】直流电路如图所示,E=15V,I k =5A,R=5Ω,求通过电源的电流,并求电源的功率。判断是消耗电能还是产生电能
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【单选题】About parenthetical expressions, which of the following is not correct?
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B.
They help to make the information more detailed.
C.
They make the information more abstract and easier to understand.
D.
They offer an easy way of giving additional explanation.
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A.
大垄断资本家的经济利益
B.
中小资本家的经济利益
C.
垄断资产阶级的整体利益
D.
全体劳动人民的共同利益
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【单选题】At the end of the first paragraph, the writer includes a parenthetical remark about the 7-second mini-commercials currently seen in Japan and Europe. The writer most likely includes this information t...
A.
the United States has fallen behind its Japanese and European competitors in some important areas of development
B.
television commercials seen in the United States may well become even shorter than they are at present
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television commercials in other parts of the world use even more advanced technology than that used in the United States
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the quality of a television commercial is net necessarily related to its length
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【简答题】放大电路如题 32 图所示, V CC = 12 V , R B1 = 15 kΩ , R B2 = 10 kΩ , R E = R C = R L =2 kΩ , U BE = 0.8 V , ß = 100 。 ( 1 )画出直流通路,求电路的静态工作点 I BQ 、 I CQ 和 U CEQ 。 ( 2 )试求该电路的电压放大倍数 A u = u o / u i ,输入电阻 r i 以及输出...
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【单选题】国家垄断资本主义对经济的宏观调节代表着（）。
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极少数金融寡头的经济利益
B.
中小资本家的经济利益
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国有企业的经济利益
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【单选题】在单边带发射机以电话方式工作时,射频信号中的载波电平接近于零的发射类型是( ):
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J3E
B.
R3E
C.
H3E
D.
F1B
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【单选题】The word 'paradox' in paragraph 1 is ______.
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a parenthetical expression
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【单选题】直流电路如图 7 所示, E=15V , I k =5A , R=5Ω ,恒压源 E 的工作状况是 ( )
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吸收功率 30W
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C.
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相关题目：
【简答题】直流电路如图所示,E=15V,I k =5A,R=5Ω,求通过电源的电流,并求电源的功率。判断是消耗电能还是产生电能
查看完整题目与答案
【单选题】About parenthetical expressions, which of the following is not correct?
A.
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B.
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C.
They make the information more abstract and easier to understand.
D.
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【简答题】国家垄断资本主义对经济宏观管理和调节代表着每一个资本家的利益。
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【单选题】垄断资本主义国家对经济的宏观管理与调节代表着（ ）
A.
大垄断资本家的经济利益
B.
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【单选题】At the end of the first paragraph, the writer includes a parenthetical remark about the 7-second mini-commercials currently seen in Japan and Europe. The writer most likely includes this information t...
A.
the United States has fallen behind its Japanese and European competitors in some important areas of development
B.
television commercials seen in the United States may well become even shorter than they are at present
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television commercials in other parts of the world use even more advanced technology than that used in the United States
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查看完整题目与答案
【简答题】放大电路如题 32 图所示, V CC = 12 V , R B1 = 15 kΩ , R B2 = 10 kΩ , R E = R C = R L =2 kΩ , U BE = 0.8 V , ß = 100 。 ( 1 )画出直流通路,求电路的静态工作点 I BQ 、 I CQ 和 U CEQ 。 ( 2 )试求该电路的电压放大倍数 A u = u o / u i ,输入电阻 r i 以及输出...
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【单选题】国家垄断资本主义对经济的宏观调节代表着（）。
A.
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B.
中小资本家的经济利益
C.
国有企业的经济利益
D.
垄断资产阶级的整体利益
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【单选题】在单边带发射机以电话方式工作时,射频信号中的载波电平接近于零的发射类型是( ):
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C.
H3E
D.
F1B
查看完整题目与答案
【单选题】The word 'paradox' in paragraph 1 is ______.
A.
a parenthetical expression
B.
a difficult puzzle
C.
an abnormal condition
D.
a self-contradiction
查看完整题目与答案
【单选题】直流电路如图 7 所示, E=15V , I k =5A , R=5Ω ,恒压源 E 的工作状况是 ( )
A.
吸收功率 30W
B.
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C.
吸收功率 75W
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查看完整题目与答案