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33.(1)98    (2)低 (3)水銀                                                      (每空1分,共3分)

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(2)                                                                   (1分) 

 

 

 

 

 

 

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32.(1)定值電阻兩端(或ab兩點(diǎn)間)的電壓                               (1分)

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31.(1)=    (2)虛                                                                        (每空1分,共2分)

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30.<                                                                                                                     (1分)

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29.1.5                                                                                                            (2分)

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28.26                                                                                                           (2分)

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27.2.22―2.26                                                                                     (2分)

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24.(2分)                               25.(2分)                    26.(2分)

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