单选题
1.【完成句子】Sagan was noted for the vigour of his logic style, especially when criticizing some piece of pseudoscience(伪科学). I remembered a 1973 AAAS meeting at which he destroyed the theories of Immanuel Velikovsky, who was maintaining that only a few thousands of years ago, Venus had repeatedly collided with Earth and Mars; events well noted. Velikovsky said, in the bible.
In Sagan's opinion, Velikovsky might be__________.
A.a member of the National Academy of Science
B.a pseudo-scientist
C.a science populariser
D.a reporter
正确答案：B
答案解析：从这段文字中，我们可以了解到作者认为，Sagan与伪科学作斗争的一个实例就是Sagan摧毁了Velikovsky的错误论述，即Velikovsky提出，在过去几千年中，水星与地球和火星反复多次相撞，这在圣经中有加载。