把一根长直导线平行地放在如图所示磁针的正上方附近,当导线中有电流通过时,磁针会发生偏转。首先观察到这个实验现象的物理学家是( )(A)奥斯特 (B)爱因斯坦 (C)牛顿 (D)伽利略 答案:A 解析:略 ------ did you remember the days _____ we worked on the farm ? ------ Certainly . Especially the hard times _______ we spent together .A.which ; whenB.when ; whenC.when ; whichD.which ; which