问题
多项选择题
石膏在吸收中储存的最大时间取决于（）。
A、锅炉负荷；
B、SO2浓度；
C、吸收塔的尺寸；
D、PH值。
答案
参考答案：A, B, C
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石膏在吸收中储存的最大时间取决于（）。
A、锅炉负荷；
B、SO2浓度；
C、吸收塔的尺寸；
D、PH值。
参考答案：A, B, C
| 完形填空。 | ||||
| "Who did this?" Mrs. Green asked with a piece of broken glass in her hand. She had never been so 1 with us. The classroom was so quiet. All students looked at the window except me. I kept my head 2 . I knew it was me. I broke it when I practiced 3 baseball. But should I tell the truth? If I did, I would be in trouble, I didn't have enough 4 . How could I afford to buy such an expensive window? I really didn't want to put up my hand, 5 at last I said. "I did it. I am sorry." It was not 6 for me to say those words. Mrs. Green went to the book shelf and took down a book. Then she walked to me. Looking at 7 , I was a little afraid. To my surprise, she said, "I know you like 8 . Here is the book about them. It's yours now. I give it to you not because you broke the window, but because you are 9 ." I couldn't believe it. I wasn't punished (惩罚). However, I was given my favorite book about birds. It happened 20 years ago, but I still 10 the book. The lesson my teacher taught me that day will be in my heart forever. | ||||
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