题目内容

围栏门的机械联锁装置目的是为了防止在吊笼离开基础平台之后,人员误闯基础平台而造成事故。()

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A. that
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D. These

It may be found that, in certain circumstances, Rader Beacon emissions can cause ____ with

A. unwanted interference
B. unexpected figures
C. abnormal data
D. unwanted information

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