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Laser-dopple radar ______. Laser-dopple radar is especially valuable in space missions because it ______.
Laser-dopple radar ______. Laser-dopple radar is especially valuable in space missions because it ______.
admin
2009-01-15
38
问题
Laser-dopple radar ______.
Laser-dopple radar is especially valuable in space missions because it ______.
选项
A、is one thousand times more precise than microwave radar
B、provides precise measures of the velocity of space vehicles
C、is a new system of radar
D、can measure the movement of a spaceship less accurately than a microwave radar
答案
B
解析
.laser-dopple radar,can measure with absolute precision...such fine measures of velocity are of prime importance.
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