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1. |
_ According to six-tenths-factor rule, if the cost of a given unit at one capacity is known, then the cost of similar unit with '' times the capacity of the first unit is approximately equal to __________ times the cost of the initial unit.$? |
A. | N |
B. | N0.6 |
C. | N0.4 |
D. | ‚Äö√ √∂n |
Answer» C. N0.4 | |