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【判断题】
慢阻肺气流受限评估是肺功能用FEV1/FVC来评估气流受限程度。( )A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】When views of spur gears are drawn, there are several parameters which should be given, include , and the others.
A.
root diameter
B.
pitch diameter
C.
outside diameter
D.
pitch
【判断题】When the spur gears are drawn in sectional views, the section lines should be drawn in gear tooth portions.
A.
正确
B.
错误
【简答题】prehens, prehend 表示—
【判断题】When the spur gears are drawn in sectional views, the section lines should be drawn in gear tooth portions.
A.
正确
B.
错误
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