单选题
The primary function of the passage as a whole is to
A、
indicate the direction that research into a particular physical phenomenon should take
B、
illustrate the limitations of applying mathematics to complicated astrophysical phenomena
C、
clarify the differences between an old explanation of a physical phenomenon and a new model of it
D、
introduce a new explanation of a physical phenomenon
E、
(E) explain the difference between two related physical phenomena
【正确答案】
D
【答案解析】
提交答案
关闭