初中教学视频免费

可以考虑简单学习网，简单学习网帮助学生复习课上没有听懂的内容，帮助学生更为系统地巩固所学内容，介绍解题的方法与技巧，打牢基础，事半功倍地提升学习效率！

简单学习网课程免费试听

相关学习资料：

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。