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【单选题】
蜗杆分度圆直径与模数的比值称为 ，用q表示。A.
蜗杆直径系数
B.
蜗轮分度圆直径
C.
蜗秆头数
D.
蜗杆分度圆直径
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皮皮学刷刷变学霸
举一反三
【判断题】The energy of a particular transition is proportional to the frequency and inversely proportional to the wavelength. ( )
A.
正确
B.
错误
【简答题】社会保障范围的大小取决于各国建立的社会保障原则。
【单选题】A restorative material that has a high proportional limit，compared with one with a lower proportional limit，invariably has( )
A.
greater ductility
B.
greater toughness
C.
a higher modulus ofelasticity
D.
more resistance to permanent deformation
【单选题】Intake air flow from a diesel engine turbocharger is directly proportional to engine______.
A.
exhaust gas pressure
B.
exhaust gas temperature
C.
speed
D.
load
【简答题】proportional controller
【简答题】be directly proportional to
【单选题】In comparison, women’s representation is inversely proportional ()the men’s .
A.
towards
B.
against
C.
with
D.
to
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