问题
多项选择题
回气枪的锥形密封面漏气，有可能是（）造成的。
A、沙粒磨损
B、焊渣磨损
C、冰渣磨损
D、LNG中硫腐蚀
答案
参考答案：A, B, C
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回气枪的锥形密封面漏气，有可能是（）造成的。
A、沙粒磨损
B、焊渣磨损
C、冰渣磨损
D、LNG中硫腐蚀
参考答案：A, B, C
| 补全对话。 | |
B: 1 A: Do you know how to get there? B: 2 It will take us about two hours to get there by bus. A: 3 B: It's an area that protects lots of different animals. A: 4 B: I'm not really sure. I know there are many different kinds of birds there and I'm going to take my camera with me. A: 5 What clothes are you going to wear? B: Well, if it's wet, I will wear my strong shoes and take my raincoat with me. A: So will I. |