Kepler proved that the sun______the center of the solar system. -题库考试答案搜索网

Kepler proved that the sun______the center of the solar system.

单选题

2021-07-18 13:03

A、Was
B、is
C、has  been    
D、had  been    

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正确答案

B

试题解析

B

标签：土木工程专升本英语3 河北工业大学英语3

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