单项选择题
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
单项选择题 The minimum range at which a target can be detected is basically determined by which of the following?（）.
单项选择题 The number of pulses of energy transmitted per second is call the（）.
单项选择题 The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.