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【单选题】
吸痰时痰液粘稠辅助叩背的目的是A.
胸壁震荡促进胸肌血液循环
B.
气管震动促进IgA功能
C.
促使痰液松动
D.
胸壁震荡提高呼吸肌功能
E.
胸壁气管震动对抗气管刺激
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【简答题】斜齿圆柱齿轮 螺旋角β越大,轮齿倾斜程度越 ,传 动平稳性越 ,但轴向力也越 。
【简答题】斜齿圆柱齿轮螺旋角β越大，轮齿倾斜程度越大，传动平稳性越（），但轴向力也越（）。
【单选题】Which feature of Hofstede's work lends the study a great deal of validity?
A.
It measured attitudes of IBM employees.
B.
It measured attitudes of many successful people.
C.
The survey was carried out in the 1970s.
D.
It surveyed 116,000 people.
【简答题】Javascript 里获取焦点的事件是 _____ 。
【单选题】Which country received the highest score for individualism in Hofstede's study?
A.
Great Britain
B.
Australia
C.
the United States
D.
Canada
【简答题】In a US study, researchers measured (测量) the happiness of 4739 people over 20 years. The study found that a person’s happiness depends on the happiness of people he connects with. Surprisingly, it als...
【单选题】The individualism versus collectivism dimension of Hofstede's study explored:
A.
the extent to which different cultures socialized their members into accepting ambiguous situations and tolerating uncertainty.
B.
the relationship between gender and work roles.
C.
how a society deals with the fact that people are unequal in physical and intellectual capabilities.
D.
the relationship between the individual and his/her fellows.
【单选题】斜齿圆柱齿轮螺旋角β 越大，传动越平稳，一般螺旋角β 的取值范围为 。
A.
β = 30°
B.
β = 8 ～ 15°
C.
β = 20°
D.
β = 2 ～ 5°
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