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【单选题】
加工箱体类零件时常选用一面两定位基准，这种方法一般符合A.
基准重合原则
B.
基准统一原则
C.
互为基准原则
D.
自为基准原则
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反馈参考答案：
举一反三
【单选题】In an outline, in order to identify the main points and supporting materials, we use symbols and indentation, for the first subpoints, we use ____ to identify them.
A.
Roman numerals
B.
small letters
C.
Arabic numerals
D.
capital letters
【单选题】I'm going to buy a watch as _____ gift to my daughter, _____ one looking nice but not expensive. [ ]
A.
a, the
B.
a, /
C.
the, the
D.
/, a
【单选题】Everyone present at the party was given a nice little gift with a suitable poem ________ to it.
A.
attacked
B.
attracted
C.
attached
D.
attributed
【单选题】There was a nice little gift for everyone, with a suitable poem _____ to it.
A.
attached
B.
to be attaching
C.
to attach
D.
attaching
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