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压力管道安装单位必须在国家质量技术监督机构()规定的范围内从事安装工作。

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操作人员巡回检查，在工艺条件方面，主要检查操作条件，包括运行压力、()。

我国工程和生活中常用的温度表示方法是()。

()是指依据一定的规则，将研究对象所具有的属性和特征用一组符号或数字表示出来。

1. Should Students Have Access to Free Higher Education？
In the first part of your writing you should present your thesis statement, and in the second part you should support the thesis statement with appropriate details. In the last part you should bring what you have written to a natural conclusion or a summary.
Marks will be awarded for content, organization, grammar and appropriacy. Failure to follow the above instructions may result in a loss of marks.
Write your composition on ANSWER SHEET FOUR.