The efficiency of a machine should be as ______ as possible to reduce the operating cost.

The efficiency of a machine should be as ______ as possible to reduce

1.	The efficiency of a machine should be as ______ as possible to reduce the operating cost.
A.	high
B.	low
C.	either of the above
D.	none of the above
Answer» B. low

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The efficiency of a machine should be as ______ as possible to reduce the operating cost.

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