直接干燥法是在常压下将粉状样品在一定温度下干燥至恒重。这里的“一定温度”指的是（）。
A.95～105℃
B.80℃
C.110℃
D.90℃
E.120℃
参考答案：A
解析：直接干燥法采用比水的沸点稍高的温度（105℃）加热试样一定时间，让水分充分蒸发，根据试样减轻的质量计算水分的含量，适用于95～105℃下，不含或含其他挥发性物质甚微的食品，主要除去水分。
| Losing a job or not being able to find one almost always brings unwelcome changes. If you’ve lost a job, the first feeling is often one of shock. On top of the loss of income, many people find the whole routine of their life is shattered, their contact with other people reduced, their ambitions halted and their identity as a worker removed. There may be good feelings too -- it’s nice to be able to lie in bed in the morning, to spend more time with children, or to have more time to think -- a better job may be just around the comer. But, unless a better job does turn up, chances are the days start getting longer and the time becomes harder to fill. Many people pass through periods of difficulty in sleeping and eating. They feel irritable and depressed, often isolated and lonely. Despite all these problems, unemployment can be a chance for a fresh start. You can discover that it provides an opportunity to sort out or rethink what you want from life and how best you can get it. You can use the time to plan how to find a new job, learn a new skill, develop your hobbies, see if you can run your own business, do some voluntary work in your community or meet new people. It’s up to you. |
According to this passage, unemployment may ______.
A．cause people to lose touch with reality
B．completely destroy people’s life patterns
C．lessen interaction with people
D．reduce people’s chances of promotion