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【单选题】
一质点作振动,已知振动频率为f,则振动动能的变化频率是:
A.
4f
B.
2f
C.
f
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参考答案:
举一反三
【判断题】对于任意两个随机事件A、B,若B⊂A,则有有P(A-B)=P(A)-P(B)
A.
正确
B.
错误
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【判断题】对于任意两个事件A、B,不一定有P(A-B)= P(A)-P(B)成立.
A.
正确
B.
错误
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【简答题】magnetic field coil
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【单选题】A residual magnetic field is always?
A.
Stronger than the magnetic field producing it
B.
Weaker than the magnetisiing field producing it
C.
Equal to the magnetising field producing it
D.
None of the above
查看完整题目与答案
【判断题】Any magnetic field can gives rise to an electric field and any electric field can gives rise to a magnetic field.
A.
正确
B.
错误
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【单选题】The diagram shows a straight wire carrying current i in a uniform magnetic field. The magnetic force on the wire is indicated by an arrow but the magnetic field is not shown. Of the following possibil...
A.
opposite the direction of the current
B.
in the direction of force.
C.
out of the page
D.
into the page
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【简答题】计算: 小题1:(1)(6分) ; 小题2:(2)(6分) .
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【简答题】已知(1-2x) 6 =a 0 +a 1 x+a 2 x 2 +…+a 6 x 6 ,则|a 0 |+|a 1 |+|a 2 |+…+|a 6 |=( )。
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【单选题】magnetic field
A.
磁力
B.
磁性
C.
磁场
D.
磁铁
查看完整题目与答案
【简答题】magnetic field
查看完整题目与答案
相关题目:
【判断题】对于任意两个随机事件A、B,若B⊂A,则有有P(A-B)=P(A)-P(B)
A.
正确
B.
错误
查看完整题目与答案
【判断题】对于任意两个事件A、B,不一定有P(A-B)= P(A)-P(B)成立.
A.
正确
B.
错误
查看完整题目与答案
【简答题】magnetic field coil
查看完整题目与答案
【单选题】A residual magnetic field is always?
A.
Stronger than the magnetic field producing it
B.
Weaker than the magnetisiing field producing it
C.
Equal to the magnetising field producing it
D.
None of the above
查看完整题目与答案
【判断题】Any magnetic field can gives rise to an electric field and any electric field can gives rise to a magnetic field.
A.
正确
B.
错误
查看完整题目与答案
【单选题】The diagram shows a straight wire carrying current i in a uniform magnetic field. The magnetic force on the wire is indicated by an arrow but the magnetic field is not shown. Of the following possibil...
A.
opposite the direction of the current
B.
in the direction of force.
C.
out of the page
D.
into the page
查看完整题目与答案
【简答题】计算: 小题1:(1)(6分) ; 小题2:(2)(6分) .
查看完整题目与答案
【简答题】已知(1-2x) 6 =a 0 +a 1 x+a 2 x 2 +…+a 6 x 6 ,则|a 0 |+|a 1 |+|a 2 |+…+|a 6 |=( )。
查看完整题目与答案
【单选题】magnetic field
A.
磁力
B.
磁性
C.
磁场
D.
磁铁
查看完整题目与答案
【简答题】magnetic field
查看完整题目与答案
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