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【单选题】
适用于盘、模具等零件的加工的数控机床是()A.
立式数控铣床
B.
数控车床
C.
数控磨床
D.
线切割数控机床
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【单选题】In spring, chickens start laying again, bringing a welcome source of protein at winter's end. So it's no surprise that cultures around the world celebrate spring by honoring the egg. Some traditions a...
A.
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B.
It is their major source of protein in winter.
C.
It can easily be made into a work of art.
D.
It can bring wealth and honor to them.
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