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