A-A+
Cepheid variable of great absolute brightness
问题详情
Cepheid variable of great absolute brightness would probably exhibit______.
A．a relatively rapid variation in brightness
B．a correspondingly weak gravitational force
C．slow and almost invisible changes in brightness
D．a strong outward flow of light pressure此题为多项选择题。请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
解析：本题的四个选项中，只有D项为正确答案。这可从文中第三段的“That is，the greater the star’s absolute brightness，the slower its cycle of variation”和第四段的“The stronger the light pressure，the slower this pulsation”推知，即星体的绝对亮度越大，其变化周期就越慢；光压越强，脉动越慢。
