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【判断题】
在其他条件相同的前提下选用粗糙度值时,摩擦表面比非摩擦面的粗糙度参数值大。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】A．unlimited B．specific C．definite D．finite
【单选题】Which of the statement is true about estimating with finite sums?
A.
Finite sums have finite many terms.
B.
The finite sum method is a precise estimation.
C.
The circumference of a circle is smaller than the sum of bottoms of the triangles from an inscribed polygon.
D.
Every term in a finite sum is positive.