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搜题
【单选题】
在维修离心水系的叶轮时,要求叶轮的进口端和出口端的外圆,其径向跳动量一般不应超过()。A.
0.02mm
B.
0. 05mm
C.
0.08mm
D.
0.10mm
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举一反三
【单选题】Skimming is a very useful technique that will allow you to read selectively, that is, to read what is important and skip what is not on your immediate purpose. Now skim the passage above and choose th...
A.
the role of sales
B.
the role of marketing
C.
a key focus area of marketing
D.
not only the role of marketing but a key focus area of it