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烟囱的最低高度应满足各行业大气污染物排放标准的要求，应高出周围m半径范围内建筑3m以上，特殊情况需5m以上。

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Exercise：Complete the sentences with the words from the box.breakthrough dropout comebackthrowback drawback1.The company is now using innovative financing strategies to achieve ________ of its business the newly launched mobile chatting app is convenient and fast.2.She’s trying to make a_ with her first album for 20 years.3.He was a high-school_ but was eagerforknowledge.4.Perhaps the biggestof onlinesocial networking is that it makes identity theft easier.5.Her whole outfit was a ______ to the 1970s

unconventionalaside fromdependentoriginateacknowledge

在实际应用中，人们通常把数据以_____的形式存入磁盘（软盘、硬盘或磁带）中

A. 二进制代码
B. 图片、声音等信息
C. 文件
D. 二维表格

下列传输介质中，抗干扰能力最好的是

A. 双绞线
B. 同轴电缆
C. 无线介质
D. 光纤