题目内容

木地板的地搁栅固定间距不得大于()。

A. 600mm
B. 500mm
C. 450mm
D. 350mm

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Which of the following integers is the closest to the value for the unit length of one leg

A. 8
B. 9
C. 10
D. 11
E. 12

A certain cube contains 125 cubic inches.What is the surface area, in square inches,of each square face of the cube?

A. 5
B. 10
C. 15
D. 20
E. 25

Events A, B, and C occur every 5 days,3 days, and 8 days, respectively. What is the number

A. 45
B. 65
C. 80
D. 90
E. 120

作业场所空气中一般粉尘的最高允许浓度为()mg/m3。

A. 5
B. 10
C. 20
D. 25

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