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常见的引火源包括：明火焰、电火花、高温物体、撞击与摩擦、光线照射与聚焦、绝热压缩(机械能转变为热能)、化学反应放热(化学能转变为热能)等七类。( )A.
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B.
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【单选题】Which cutting parameter has the main contribution for changing the cutting speed?
A.
Spindle rotating speed
B.
Feed speed
C.
Cutting depth
D.
Cutting tool geometry
【单选题】The moment _____ Leo will never forget is _____ Mr. Smith gave him a lot of valuable advice on how to improve his writing.
A.
that; that
B.
when; that
C.
when; /
D.
that; when
【简答题】Nanjing-style paper cutting is an important part of Chinese paper cutting. It is known for its different designs, simplistic but graceful shapes, finely cut lines and unique skills. Zhang Fanglin is a...
【单选题】The moment ________ Leo will never forget is________ Mr. Smith gave him a lot of valuable advice on how to improve his writing.
A.
that; when
B.
that; that
C.
when; that
D.
when; /
【多选题】According to the different structures of the machine parts, different types of cutting surfaces can be used. The cutting surfaces include .
A.
Single cutting plane
B.
Several intersecting cutting planes
C.
Several parallel cutting planes
D.
Single cylindrical surface
【简答题】从形式层面，教案可分为，详细教案、简明教案和 三种。
【简答题】The moment ________ Leo will never forget is ________ Mr. Green gave him a lot of valuable advice on how to improve his writing.
【单选题】The article is too long. It needs _______ a little.
A.
cutting off
B.
cutting down
C.
cutting up
D.
cutting out
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