问题
单项选择题
设有一室内低压蒸汽供暖系统,最不利管路长度为100m,经计算得锅炉运行表压力为()kPa。
A.10
B.12
C.8
D.14
答案
参考答案:B
设有一室内低压蒸汽供暖系统,最不利管路长度为100m,经计算得锅炉运行表压力为()kPa。
A.10
B.12
C.8
D.14
参考答案:B
根据短文内容,完成下列表格,每空一词。 The home of the future won’t be completely different and we will be living in houses and flats as we do today. But people will want to shape their homes to match their dreams. No two homes will be the same. People will be able to buy “house materials” containing moveable walls, doors and windows. They will put together the different parts to create the home they want. Many jobs that we do today will disappear, others will still be done but will change and new jobs will be created. Skilled workers such as builders, gardeners and electricians won’t disappear because machines can’t take the place of them. We will still have teachers because students need human contact. But they will be using modern technology in class more and students will be working more from home. Space holidays will develop in the future, but these holidays won’t be for everyone because they won’t be cheap. Short space trips will develop first, then hotels will move around the earth where it will be possible to have a longer vacation. By the end of the next century, there will be holiday centers on the moon with things needed for families. There will be no paper in the future. Instead, there will be e-paper which people will be able to use over and over again. This will develop in order to protect nature. E-newspapers and e-magazines will take the place of traditional newspapers and magazines and we will download information and news articles from the Internet every day onto our re-useable paper. As we know, the earth is going to disappear sometime in the future. This isn’t going to happen tomorrow but scientists say that it will happen in five billion years. We will have to find another home. At sometime in the future far away, either we stay on the earth and die with it, or we leave and move to another plant. There won’t be any other choice.
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