题目内容

It is indicated in Paragraph 1 and 2 that______.

A. all airlines provide Wi-Fi Internet service
B. aircraft-communications" frequency is higher than that of Wi-Fi
C. airlines provide Wi-Fi service selectively
D. not all mobile phones" signal will interfere with navigation

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The main idea of the text is that______.

A. accents are unfortunately often used to reinforce preexisting linguistic stereotypes
B. accents are used to identify the social background of a speaker
C. accents are generally used to form. negative opinions of the speaker
D. we must stop discriminating against people due to accent

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It is indicated in Paragraph 1 and 2 that______.

A. all airlines provide Wi-Fi Internet service B. aircraft-communications" frequency is higher than that of Wi-Fi C. airlines provide Wi-Fi service selectively D. not all mobile phones" signal will interfere with navigation

The main idea of the text is that______.

洞口作业的防护措施，主要有设置()。A . 封口盖板B . 防护栏杆C . 安全网E . 栅门

组织脚手架检查与验收的是()

边长在150cm以上的洞口的安全防护措施是()。

A. all airlines provide Wi-Fi Internet service
B. aircraft-communications" frequency is higher than that of Wi-Fi
C. airlines provide Wi-Fi service selectively
D. not all mobile phones" signal will interfere with navigation

洞口作业的防护措施，主要有设置()。
A . 封口盖板
B . 防护栏杆
C . 安全网
E . 栅门