Official 19 Lec 2
Question 3 of 6
According to the professor, why are radio waves particularly useful for astronomical observations?

A.

Some astronomical bodies emit radio waves but not visible light

B.

Radio waves provide more information about star composition than visible light waves do

C.

Radio waves can be detected with simple equipment

D.

Radio waves can pass through particles in space

正确答案:AD

显示答案
进入答题
00:00
00:00
隐藏原文

译文

精听文本