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  3. The hypothesisthat the explosion was cau

The hypothesisthat the explosion was cau

考试题库2022-08-02  51
问题 The hypothesisthat the explosion was caused by a rock colliding with the EarthA. has remained a puzzleB. lacks sufficient evidenceC. is a university professorD. was generated by the explosionE. will kill many animalsF. are attacked by aliens
选项 A. has remained a puzzle
B. lacks sufficient evidence
C. is a university professor
D. was generated by the explosion
E. will kill many animals
F. are attacked by aliens
答案 B
解析
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