单选题
发布日期:2021-03-22
three black shapes in a vertical line; the highest and lowest are balls,and the middle one is a diamond
three shapes in a vertical line; the highest and lowest are red balls,and the middle one is a white diamond
three black balls in a vertical line
two black balls in a vertical line
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()组织结构形式是介于直线制-参谋制与分部制之间的过渡形式。它可以吸收两种形式的主要优点而克服其缺点。
下列哪一类控制不属于列车子系统级控制。()
关于深压触诊法下述哪项正确()
按材质的不同分,茶具主要有以下几个种类:()、陶瓷茶具、()、玻璃茶具、()、竹木茶具等。
股指期货交易中面临法律风险的情形是()。
187分配阀管座上有两个空腔,其一为(),其二为滤尘室。
一般的苷键对稀碱较稳定,对酸不稳定。
提高充气效率的具体措施有哪些?
主题词和关键词的区别是什么?
一般情况下,一、二级耐火等级的多层民用建筑之间的防火间距不应小于()m。
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所谓管线(pipeline)|是指?()
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A gate valve installed in a pipeline should be ().
Cost of pipeline is very different of underground conditions. Is it right? ()
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