题目

One of Britain's bravest women told yesterday how she helped to catch suspected (可疑的) police killer David Bieber -- and was thanked with flowers by the police. It was also said that she could be in line for a share of up to ￡30,000 reward money. Vicki Brown, 30, played a very important role in ending the nationwide manhunt. Vicki, who has worked at the Royal Hotel for four years, told of her terrible experience when she had to steal into Bieber's bedroom and to watch him secretly. Then she waited alone for three hours while armed police prepared to storm the building. She said: I was v20g盐放入1000克水中，盐水的浓度是 %（得数保留一位小数）．