4. It can be inferred from the passage that the Sun
A. is approximately halfway through its life as a yellow dwarf.
B. has been existence for 10 billion years.
C. is rapidly changing in size an brightness.
D. will continue as a yellow dwarf for another 10 billion years.
Trang 9
Bạn đang xem 4. - KỲ THI HỌC SINH GIỎI KHU VỰC ĐỒNG BẰNG SÔNG CỬU LONG NĂM HỌC 2010 2011 PPSX
