题目内容
（请给出正确答案）
A. Such … as
B. Just … as
C. Such as … so
D. Just as … so
如果结果不匹配，请 联系老师 获取答案
更多“_______ radar is to airplanes …”相关的问题
Implied but not stated is that__________．
A.laser—doppler radar ismore accurate than microwave radar
B.microwave radar operatesat a higher frequency than laser—doppler radar
C.the light—beam radar canmeasure only slow speeds with accuracy
D.microwave radar may notensure absolute precision in measuring varying speeds
Implied but not stated is that ______.
A．laser-doppler radar is more accurate than microwave radar
B．microwave radar may not ensure absolute precision in measuring varying speeds
C．the light-beam radar can measure only slow speeds with accuracy
D．microwave radar operates at a higher frequency than laser-doppler radar
Laser-doppler radar is especiallyvaluable in space missions because__________．
A.it can measure themovement of a spaceship less accurately than a microwave radar
B.it is a new system ofradar
C.it provides precisemeasures of the velocity of space vehicles
D.it is onethousand times more precise than microwave radar
Laser-doppler radar ______.
A．measures the movements of a spaceship by means of light beam
B．makes use of microwaves
C．makes use of sound waves
D．Both A and B
Laser-doppler radar is especially valuable in space missions because ______.
A．it is one thousand times more precise than microwave radar
B．it provides precise measures of the velocity of space vehicles
C．it is a new system of radar
D．it can measure the movement of a spaceship less accurately than a microwave radar
A．while
B．if
C．whenever
D．during
A.make it possible
B.makes it possible
C.makes possible
D.make it a possibility
An appropriate title for this passage would be ______. ()
A．Rendezvous in Space
B．Landing at a Space Station
C．New Radar for the Space Age
D．Space Navigation
