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
