【单选题】

Laser-dopple radar ______.
A．measures the movement of a spaceship by means of light beam

B．makes use of microwaves
C．makes use of sound waves
D．both A and B

查看答案解析

参考答案：

正在加载...

答案解析

正在加载...

根据网考网移动考试中心的统计，该试题：

76%的考友选择了A选项

1%的考友选择了B选项

15%的考友选择了C选项

8%的考友选择了D选项

Laser-dopple radar ______.A．measures the movement of a spaceship by means of light beam