本题目来源于试卷: Nuclear & Quantum Physics E.5 Stellar Properties & Processes，类别为 IB物理学
[单选题]
Which of the following irl// *u4 pabyg-y3krlqs;u5 h(ga 2rvs correct about a red giant star?
I. The orbits of the inner planets of the solar system and could fit into the volume of it
II. Cooler than the Sun
III. Have higher luminosity than the Sun
A. $I$ only
B. $II$ only
C. $I$ and $II$ only
D. $I$ and $III$ only
参考答案: D
本题详细解析:
Explanation: By considering the position of the red giants and the Sun on an H-R diagram, it is easy to say that red giants have higher luminosity and lower temperature than Sun. But they are not big enough like supergiants to have a volume that could include the Sun and inner planets inside.
| 
