单项选择题
造成设备技术性陈旧的磨损类型是()。
A.有形磨损
B.无形磨损
C.自然磨损
D.物理磨损
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单项选择题
A.Level Two course beginning on Saturday in October. B.Full time courses taken in evenings. C.An 8-month course two nights a week. D.Intensive course on every Saturday and Sunday.
A.Level
B.Full
C.An
D.Intensive
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多项选择题
子宫位置的维持依靠()
A.肛提肌
B.会阴中心腱
C.子宫诸韧带
D.尿生殖膈
E.闭孔内肌
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