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【判断题】
保护接地主要应用在中性点不接地的供电系统中。A.
正确
B.
错误
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】阅读理解。 Hello, everyone! This is my bedroom. That is my green bed. It's very lovely. Isn't it? Can you see the pink pillow? It's my pillow. I like it very much. The dresser is beside (在……旁边) the bed. It...
【简答题】阅读理解。 Hello, everyone! My name is Wang Haibo. My English name is Daniel. I live in Yibin. Look! This is my school. It is called Yuejiang Secondary School. It is an old school, but it is very big and n...
【单选题】听力原文： Hello everyone and welcome to the online marketing workshop. My name is Stephanie Eubanks and I work for the Hurley Chamber of Commerce. I'd like to thank you all for coming. Today, online marke...
A.
To teach online marketing
B.
To thank for using online service
C.
To instruct on giving presentations
D.
To demonstrate interviewing techniques
【简答题】Hello, everyone! My name is Bob. I live in Toronto, Canada. It's a very beautiful city. My parents are from France. They speak French. And I can speak English and French. I am 13 years old and my birt...
【简答题】某地共有居民30000户,按经济收入高低进行分类,其中高收入居民为6000户,占20%;中等收入居民为15000户,占50%;低收入居民有9000户,占30%。现要从中抽出1000户进行购买力调查,试采用等比例分层抽样法确定各层应抽取的样本数。
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