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【简答题】
亚共析钢或过共析钢在加热温度较高,奥氏体晶粒( ),冷却速度( )时,其珠光体组织正常,但先共析体或先共析渗碳体在氏体晶界形核后内平行或成一定角度长大,呈现为平行或成一定角度、相对粗大的片、针状,该组织称为( ),通常具有较低的( )性能。
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举一反三
【简答题】What’s the sequence of the four strokes?
【单选题】What is the first paragraph mainly about?
A.
Many voices in cell phones are genderless.
B.
Male or female, it’s hard to distinguish.
C.
Female voices dominate electronic devices.
【单选题】Task 1 We don’t have beds in the spacecraft, but we do have sleeping bags. During the day, when we are working, we leave the bags tied to the wall, out of the ways. At bedtime we untie them and take t...
A.
on the wall
B.
to their seats
C.
onto the flight deck
D.
anywhere they like
【简答题】Task 1 We don’t have beds in the spacecraft, hut we do have sleeping bags. During the day, when we are working, we leave the bags tied to the wall, out of the way. At bedtime we untie them and take th...
【简答题】把下列二进制数转换成八进制数 (10011011100) 2 =( ) 8
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