下列地理现象的发生与地球自转无关的是[ ]
A.昼夜现象
B.长江三角洲的发育
C.太阳的东升西落
D.北京的地方时比乌鲁木齐早
答案:A
电冰箱是利用制冷剂气体在冰箱背后的冷凝管中______放热,使冰箱后背发烫,制冷剂液体进入蒸发器______吸热,使冰箱内温度降低.(填物态变化)
He worked hard before the college entrance examination, and it_________. His dream to go to college came true. [ ]
A. showed off
B. paid off
C. put off
D. took off