变压器的冷却方式有自然冷却、风吹冷却、（）、（）。
参考答案：强迫循环水冷却；强迫油循环导向风吹冷却
She _____ his number in the phone book to make sure that she had got it right.[ ]
A. looked for
B. looked up
C. looked after
D. looked like
教学的艺术在于激励、唤醒和鼓舞。（）
