A-A+
The reflected light would sweep slowly along t
问题详情
The reflected light would sweep slowly along the surface of the earth because the mirrors
A．would be operated by solar-powered engines
B．could be made to adjust their angles
C．could move around the earth at the same speed as the earth turns on its axis
D．would orbit thousands of miles high to catch the sun"s light请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
解析：本题是一道具体细节题。问反射的太阳光线可以慢慢扫过地球表面的原因是什么。文章第五段指出，科学家们说，计算机控制的镜面还可以缓慢倾斜，使反射的阳光缓慢地沿地球表面扫过。比如，当夜幕降临时，经倾斜的镜面可以照亮波士顿，稍后，随着夜色的逐渐西移，可照亮芝加哥，然后照亮旧金山。因此，本题的正确答案应是B“因为这些反射镜可以调整其倾斜角度”。
