题目

David Beckham’s career ____ almost immediately when he was on the Manchester United’s youth team in 1992. A. took up    B. got off     C. showed off     D. took off 答案：D19．全椒冬天的清晨，有时郊外草地上会出现一层白白的东西，太阳出来后一会就变成水了，最后不见了，它经历了怎样的物态变化（　　）A．液化-汽化-升华B．凝华-熔化-汽化C．汽化-升华-凝固D．升华-熔化-凝华