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【判断题】
In the English vocabulary, foreign elements made up a much bigger part in number than the native element. [2.3]
A.
正确
B.
错误
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Which of the following is true of the impact of high product quality on competitive advantage?
A.
It decreases the utility of the products.
B.
It lowers unit costs of the products.
C.
It adversely affects employee productivity.
D.
It limits the company's ability to differentiate its products.
E.
It increases the need for after sales services.
【单选题】To assist separation of low viscosity oils steam coils or electric heaters are fitted ______ of the oily water separator.
A.
in entrance
B.
in exit
C.
in the upper part
D.
on the outside
【单选题】滚齿机滚切斜齿圆柱齿轮时,展成运动换置公式和附加运动换置公式分别为: ,该方案不合理是因为:
A.
附加运动换置公式中有z，因此不能保证形成渐开线齿廓
B.
附加运动换置公式中有 ，因此不能保证形成渐开线齿廓
C.
展成运动换置公式中有 ，不能准确形成齿轮的渐开线齿廓；附加运动换置公式中有z，不能保证齿数不同的主、从动齿轮螺旋角相同
D.
展成运动换置公式中有z，因此不能保证齿数不同的主、从动齿轮螺旋角相同