单选题The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.Aone-millionth part of a secondBone-thousandth part of a secondCone-hundredth part of a secondDone-tenth part of a second
单选题
The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.
A
one-millionth part of a second
B
one-thousandth part of a second
C
one-hundredth part of a second
D
one-tenth part of a second
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