问题
问答题 简答题
试简述电压摆产生的原因？
答案
参考答案：
1.低铝水平情况下产生的局部压槽，使电解槽产生振动；
2.长效应对电解炉膛的破坏，造成电压摆；
3.低分子比，低槽温是造成电压摆的主要原因。
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试简述电压摆产生的原因？
参考答案：
1.低铝水平情况下产生的局部压槽，使电解槽产生振动；
2.长效应对电解炉膛的破坏，造成电压摆；
3.低分子比，低槽温是造成电压摆的主要原因。
情景交际。从七个选项中选出符合对话内容的选项填入对话中。有两项多余。（5分） Lana went to see a new movie in the morning. But she didn’t enjoy it. She’s talking to Jenny about what happened. Jenny: You look unhappy. 1 Lana: I watched a movie in the morning. Jenny: 2 Lana: No. The movie was great. It was the audience（观众）. Some people were late for the movie, some took phone calls during the movie, some made noise while eating snacks and some talked loudly. 3 Jenny: That’s too bad! People should obey certain rules while watching a movie. Lana: Yes. The first thing is to keep the theater quiet. We should sit down before the movie begins. 4 We should eat snacks quietly. And we should talk as little as possible. Jenny: 5 And we should take away our rubbish when we leave. Lana: I hope everyone should do these things so that we can enjoy the movie better. Jenny: Me, too.
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