对锅炉给水经常监督的项目是硬度,溶解氧、PH值、和铜、铁含量等。监督这些项目的主要目的是防止热力设备及系统腐蚀和()。
参考答案:结垢
下列对解放区文学创作评价正确的有()
A.《新儿女英雄传》是章回体小说
B.《原动力》是解放区第一部工业题材小说
C.《平汉路工人破坏大队》的作者是柯仲平
D.《种谷记》是柳青的第一部长篇小说
根据下面一段对话内容,从下面选项中选出能填入空白处的最佳选项,其中两项为多余选项。 A: Oh, hi, Tess! I’m sorry. I’m thinking about something. B. (16)A. I am. I have a chance to go onatour. B. A tour What kind of tour A: A music tour. (17)B: Wow! That’ s great. They are pretty famous. A: (18)B: So you’re going to do it A: I don’t know. (19)B: It sure would! Where will the tour go A: (20)B: How long is the tour A: Four months. B: OK, wish you a happy travel! A: Thank you!
该处选项为()。
A.This tour is the chance of lifetime.
B.It goes all over North America and South America.
C.It looks like you’re dreaming about something.
D.You’ll have to quit school and your job at the store.
E.My agent wants me to go on a tour with Art’s Jazz Band.
F.Have you told anyone about this yet
G.It would be a great opportunity!