You can connect a wire to the positive and negative ends of a battery __________.
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1 .Paragraph 3 _______
A The Main omponents of Maglev Train System B High-speed Maglev due to Zero riction C The Working Principle of the maglev Train D Differences between Polarity and Magnetic Field E Comparison of Maglev Trains with Traditional Ones F Maglev with a Powerful Motor
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3 .Paragraph 5 ________
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4 .Paragraph 6 _________
A The Main omponents of Maglev Train System B High-speed Maglev due to Zero riction C The Working Principle of the maglev Train D Differences between Polarity and Magnetic Field E Comparison of Maglev Trains with Traditional Ones F Maglev with a Powerful Motor
5 .Several countries in the world are using strong electromagnets ________.
A to develop a maglev train rail system B to explain why maglev trains are faster C to pull and push the train forward D to create a magnetic field E to experiment with the maglev train F to travel from Paris to Rome in about two hours
7 .A unique system of magnetic fields is created by the coils _______.
A to develop a maglev train rail system B to explain why maglev trains are faster C to pull and push the train forward D to create a magnetic field E to experiment with the maglev train F to travel from Paris to Rome in about two hours
8 .The frictionless maglev train enables you ___________.
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9 .What is the main idea of the passage?
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