It was in 1665_____the concept of the Earth’s gravity interested Isaac Newton.
举一反三
- Once out of the earth’s gravity, the astronaut is affected by the problem of ______ (weight).
- 科学史学科的奠基人是（）。 A: Isaac Newton B: Isaac Asimov C: Paul Forman D: George Sarton
- Which of the following scientists is not British? ( ）。 A: Stephen Hawking B: Charles Darwin C: Isaac Newton D: Albert Einstein
- "Knowledge is power" is one of the quotations from _________. A: John Locke B: Francis Bacon C: Isaac Newton D: Gotffried Wilhelm yon Leibniz
- Sir Isaac Newton has been called the "father of observational astronomy", "father of modern physics", "father of the scientific method" and "father of modern science".