题目内容
挤压机的加热冷却系统多是分段设置的。
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目前大部分双螺杆挤压机采用同向旋转。
Complete the following statements according to what you have heard.1. According to Dr. Hertz, to his grandparents the American Dream first meant getting out of ___________; later it comes to mean the chance _____________.
In Dr. Hertz's opinion, _________________wants people to believe in the American Dream because it tends to use the American Dream to keep most of its population working and spending their money so as to ______________________.
Dr.Hertz says the American Dream is _____________ because one wants to live as well as or better than others. It is ________________ because one has to keep on spending money so as to have the things other people have,
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