运用活性指数的概念来分析与表示搬运活性水平的高低时，处于运行状态的物品，因为不需要再 发布时间：2017-06-15 01:46 │ 来源：www.tikuol.com 题型：单项选择题 问题： 运用活性指数的概念来分析与表示搬运活性水平的高低时，处于运行状态的物品，因为不需要再进行其他作业就能运走，其活性指数最高，定为( )。A．0.5B．0C．4D．1
题型：单项选择题 阅读短文，根据上下文意思，将方框中的句子还原到短文中适当位置，使其通顺完整，其中有一句不选。 A. And the police passed it to the RAF to examine B. She thought the metal came from a plane C. It could have been in space for over 10 years D. Pieces from old satellites are dangerous E. Welton told British newspaper to Telegraph what she saw Mabel Welton, 62, was in her living room when a piece of dark gray metal hit the roof of her home. 1 . Because her house in Hessle, UK lies under a flight path. However, after examining the piece, the Royal Air Force (RAF) said that the metal was space junk that fell to Earth. 2 . "We heard this sound and went outside and saw this hole in the roof," she said. "The metal had broken two tiles and made a mess." Welton said that her granddaughter's boyfriend Richard Sutcliffehad to "put on some oven gloves to get it because it was so hot." The Weltons gave the metal to the police. 3 . Last Thursday, the RAF said they learned that the metal was space rubbish. 4 . A great number of pieces from more than 5,000 old satellites are now in space. Most pieces have fallento earth without doing damage to people or houses. 查看答案