常年从事接触高温作业的工种，应以（）测量值为高温作业分级依据。
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阅读下列材料，回答 46～50 题：
第 46 题 According to the text，making monetary policy changes __________.
What is the main idea of the man's speech？
What is one of the most popular types of books？
The author appears to be very critical of __________.
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