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【简答题】
在_________中,受电弓的接触压力在40-120N的范围内可调,在_________中,受电弓的接触压力在50-120N的范围内可调。
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【简答题】The engine is equipped with a charge air cooler. The insert type charge air cooler is mounted in a welded casing (air trunk) . The trunk is bolted to the engine block. Standard is a two-stage cooler m...
【单选题】Coolant in a liquid-cooled system flows directly from the water pump to the _____.
A.
water jackets and passage
B.
top of the radiator
C.
cylinder head
D.
bottom of the radiator
【单选题】Coolant in a liquid-cooled system flows directly from the water pump to the__________.
A.
bottom of the radiator.
B.
water jackets and passages.
C.
cylinder head.
D.
top of the radiator.
【单选题】检索词的匹配操作练习,利用手机或电脑,打开中国知网(www.cnki.net),在主页上方的检索框中输入“中草药萃取”,点击 ,浏览检索结果,检索结果是字面匹配还是智能语义匹配?( )
A.
字面匹配
B.
智能语义匹配
【单选题】在中国知网(www.CNKI.net)中查找2000-2019年发表的关于“振捣棒变速器”的文献，请利用跨库检索，选择专业检索：SU=((振捣棒+振动棒)*变速器)进行检索，下列关于检索结果的说法正确的是
A.
查找到的文献中有一项科技成果
B.
查找到的文献中有一篇发表于2011年
C.
查找到的文献中有一篇博士论文
D.
仅检索到一篇文献
E.
以上都不是答案
【单选题】Coolant in a liquid-cooled system flows directly from the water pump to the ______.
A.
bottom of the radiator
B.
water jackets and passage
C.
cylinder head
D.
top of the radiator
【简答题】In an automobile engine, heat flows or transfers from the iron or aluminum cylinder to the cooling water, and from the coolant to the copper or aluminum radiator.
【简答题】Fill in the blanks based on the attached video-clip about a brief introduction to boilers in thermal power plant. 爱剪辑-steam boiler2.mp4 1. Burners in the boiler convert the chemical energy in the ____...
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