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【单选题】
卧式镗床床身导轨水平面的直线度误差，将会导至镗孔时产生（）误差。A.
直线度
B.
圆度
C.
圆柱度
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反馈参考答案：
举一反三
【单选题】紫外-可见分光光度法测定的灵敏度高,准确度好,一般其相对误差在
A.
不超过 ±0.1 %
B.
1%~4%
C.
5%~20%
D.
5%~10%
E.
0.1%~1%
【多选题】The following are true of the classical Greek theater
A.
Although the names of numerous tragedians are known to us, the plays of only two survive.
B.
At first, the chorus served as both the collective actor and the commentator on the events of the drama; it became increasingly important with the development of Greek theater.
C.
It is one of the most important and famous insitution of Greek civilization.
D.
It rose originally in connection with the worship of Dionysus.
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