The little boy is wondering whether it is true that all the planets all _____ around the sun in the same direction.
举一反三
- Which of the following does not characterize Mercury A: nearest of all planets to the sun B: extremely hot C: little known to people D: biggest of all planets
- Not only all the planets but also the sun ____ in constant motion. A: are B: were C: be D: is
- Sentences in a coherent paragraph form a clear logical connection and they all head in the same direction. ( )
- According to Newton's principle ______. A: the force of gravity keeps planets orbiting around the sun rather than flying off B: the sun is the most massive object, making up 99.8 percent of the mass of the solar system C: the amount of mass determine how fast the objects travel as they orbit each other D: Pluto receives the least force of gravity from the sun of all the planets in the solar system
- Which of the following are deductive arguments？ A: All dogs are mammals. All mammals have kidneys. Therefore all dogs have kidneys. B: Since all squares are rectangles, and all rectangles have four sides, all squares have four sides. C: All science teachers are smart, since all my physics teachers, chemistry teachers and biology teachers are smart. D: The sun is a star; the sun has planets; therefore some stars have planets.