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【单选题】
钢尺量距中，钢尺的尺长误差对距离丈量产生的影响属于（ ）A.
偶然误差
B.
系统误差
C.
可能是偶然误差也可能是系统误差
D.
既不是偶然误差也不是系统误差
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反馈参考答案：
举一反三
【单选题】Most of his books are said ______ into several languages already. [ ]
A.
to be translated
B.
being translated
C.
to have been translated
D.
translate
【单选题】What is the author's attitude towards the reconstruction of The Pentagon and the World Trade Centre?
A.
Supporting.
B.
Critical.
C.
Neutral.
D.
Hostile.
【单选题】What is the author's attitude towards the reconstruction of The Pentagon and the World Trade Center?
A.
Supporting
B.
Critical
C.
Neutral
D.
Hostile
【单选题】It was most probable that Dr. Ginoux was______.
A.
a member in that organization
B.
a well-trained surgeon
C.
a graduate from American College of Surgeons
D.
a distinguished surgeon in America
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