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• 11.鉛直豎立一根通有直流電的長直導線,一磁針在水平面上,自導線處向北方逐漸遠離導線,若磁針N極偏轉角度與北方夾角為θ時,磁針與導線相距r,則下列何者正確?(A) (B) (C) (D)
• 2. The country has been ________ by drought ever since the river that ran along the border was cut o
• 3. The students, too ________ to stand against the bully, are cowering in a corner with fear. (A)men
• 4. To ensure the mobility rights, protesters inveigh against the military ________ in their city. (A
• 5. Stephen Hawking is recognized for his ________ work on black holes and singularities. His theory