问题
选择题
把方程x-
|
答案
x-
=2-x-1 2
，x+2 5
去分母得：
10x-5（x-1）=20-2（x+2）．
故选：B．
搜题请搜索小程序“爱下问搜题”
把方程x-
|
x-
=2-x-1 2
，x+2 5
去分母得：
10x-5（x-1）=20-2（x+2）．
故选：B．
| 阅读短文，根据短文内容，从短文后的五个选项中能出选填入空白处的最佳选项。有一个选项为多余选项。 | |
| Mabel Welton, 62, was in her living room when a piece of dark gray metal hit the roof of her house. 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 Sutcliffe had 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 fallen to Earth without doing damage to people or houses.
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