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最佳答案：pressure tubes 有压力管non-pressurized tubes 无压力管【希望帮助到你,若有疑问,可以追问~~~祝你学习进步,更上一层楼!(*
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最佳答案：We always believe that pressure is the source of motivation.
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最佳答案：There are many ways to reduce the pressure.
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最佳答案：Listening to music is great for relieving pressure.
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最佳答案：I feel stressfull as the other students in the class.
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最佳答案：About the top presure of boiler,there are two situations:1.the top presure with
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最佳答案：too muchmake worried希望对你有所帮助,有不会的再问吧
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最佳答案：1.Everything has dual character,different people have different opinions about p
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最佳答案：Now have 50% of students for homework more stress, but the worry, 30% of student
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最佳答案：1,when he found this company,he was under bug pressure of success.2,the office h