问题
问答题 简答题
根据工作压力不同，除氧器可分为哪三种？
答案
参考答案：
分为真空式、大气式和高压式三种。
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根据工作压力不同，除氧器可分为哪三种？
参考答案：
分为真空式、大气式和高压式三种。
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| Our school has a library. There are many 1 in it. All the students in our school can borrow books 2 the library, but you can't 3 them for more than two weeks. Everyone must give back the library books 4 . One afternoon, Miss Yang was working at her desk in the library when Han Mei 5 ." Excuse me, Miss Yang," She said." I'm very sorry. I borrowed a book ten days ago. But I can't 6 it. I think I've lost it.""Oh dear!" said Miss Yang,"What was the name of the book?"" It was 'Harry Potter'.""What a pity! I'm 7 that if you've lost it, you must pay for (偿还) it," said Miss Yang. Just then Lucy came into the library." Excuse me, Miss Yang. I've just found this book. I like this book very much, but I think it's the 8 , so I come to 9 ." "Oh, good girl!" Miss Yang got the book and said."It's 'Harry Potter'. Come on, Meimei! Is it the book you've lost?" "Yes," Han meimei said." Thank you, Miss Yang!""Don't thank me, we 10 thank Lucy!" said Miss Yang. | ||||
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