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【简答题】
电磁吸盘用来吸住工件以便进行磨削 .它比机械夹紧迅速、操作快速简便、不损伤工件、一次能吸好多个小工件,以及磨削中工件发热可自由伸缩、不会变形等优点。不足之处是只能对( )如钢铁等的工件才能吸住。对磁性材料如铝和铜的工件没有吸力。电磁吸盘的线圈通的是( ),不能用交流电,因为交流电会使工件( )。
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举一反三
【简答题】Please send us full details of your goods and give your earliest delivery date.
【简答题】工期索赔值的计算方法主要有 和比例计算法 。
【简答题】下面，请听题，回答 11～13 题。 第 11 题 How does a whale keep itself warm?
【单选题】Question 1.From the passage, we know that _______. ---- Passage 2 ----- (Para. 1)Many connections between mind and heart are now scientifically confirmed; our emotional well-being affects our physical...
A.
schools pay less attention to tests today
B.
schools pay more attention to students’ physical health
C.
schools paid more attention to tests before the 21st century
D.
the statement that “our emotional well-being affects our physical well-being” is based on scientific studies
【单选题】Directions: read the "Famous Cars",After reading the passage, you will find 5 unfinished statements. For each question or statement, please choose the best answer from the four choices provided. 1. F4...
A.
function
B.
design
C.
company
D.
system
【单选题】As soon as the goods are dispatched, please send us full details of the shipment ______ us to arrange for the insurance here.
A.
that enabled
B.
so as to enable
C.
thus enable
D.
thus enabled
【简答题】工程工期索赔的计算方法主要有（ ）。
【单选题】Task 1 Choose the best answer to each question according to the passage we have learned . 1. According to the passage , how can you avid being late for an interview?
A.
You should f ind out where the interview will be and how to get there.
B.
You should find out where the interview will be .
C.
You should f ind out how to get there.
D.
You should f ind out where the interview will be or how to get there.
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