本章节介绍关于安装位置和仪器连接的注意事项，建议使用本机前阅读本章节内容。
This chapter gives an overview of the precautions concerned with the installation places and the instrument connection. You are suggested to read this chapter before applying the instrument.
文章介绍了在设计阅读理解题时应该注意的两个问题：一是内容及难度须合宜；
This article introduces two aspects we should pay attention to when we design reading comprehension: 1) the content and the degree of difficulty should be appropriate;
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