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【单选题】
自动喷水系统中水流指示器的信号阀应安装在水流指示器前的管道上,与水流指示器之间的距离不应小于( )mm。
A.
100
B.
200
C.
300
D.
500
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【简答题】什么是保护接零?
【判断题】保护接零是借助接零线路在设备漏电时形成单相短路,促使线路上的保护装置动作,从而切断故障设备的电源,保护电路。
A.
正确
B.
错误
【简答题】In the early 1980s, logistics was introduced to China from ________ 。
【单选题】In the 1980s, which kind of transportation is the most widely used in China?
A.
Feet
B.
Bike
C.
Car
D.
Railway
【简答题】In China,people born in and after the 1980s are called the post-80s generation(一代人).Most of them come from single-child families. However,this generation is playing a more and more important part in C...
【单选题】以需要为研究基础,着重对激励的原因与起激励作用的因素的具体内容进行研究,这种理论是()。
A.
过程型理论
B.
行为改造理论
C.
综合激励模式理论
D.
内容型激励理论
【简答题】以需要为研究基础,着重对激励的原因与起激励作用的因素的具体内容进行研究,这种理论是() A.过程型理论 B.行为改造理论 C.综合激励模式理论 D.内容型激励理论
【单选题】China's largest export commodity at the beginning of the 1980s was ______ .
A.
Textiles
B.
Clothing
C.
Agriculture products
D.
Oil
【简答题】阅读理解。 In China, people born in and after the 1980s are called the post-80s generation (一代人). Most of them come from single-child families. However, this generation is playing a more and more important...
【单选题】植物纤维原料中的( ),易吸水润胀,便于打浆。
A.
纤维素
B.
半纤维素
C.
木素
D.
单宁
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