A: Beta particle
B: alfa particle
C: Gama particle
D: A and B
举一反三
- The black hole is ( ), and no particle or electromagnetic radiation can escape from it.
- A _______ is the locus of points traversed by a given particle as it travels in a field of flow; it provides us with a “ history ” of the particle’s locations. A: system B: streamline C: pathline D: particle
- Suppose a particle moves in a circle. Which statement is correct?
- 要实现渐变贴图应选择（ ）。 A: Gradient B: Raytrace C: Particle Age D: Particle Mblure
- 1. A charged particle is traveling through a uniform magnetic field. Which of the following statements are true of the magnetic field? A: It exerts a force on the particle parallel to the field. B: It exerts a force on the particle along the direction of its motion. C: It increases the kinetic energy of the particle. D: It exerts a force that is perpendicular to the direction of motion.
内容
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A verb phrase contains a()________, together with any associated ____, _____ and adverb. ___ A: main verb; modal verb, negative particle B: finite verb; associated auxiliary verb, negative particle C: transitive or intransitive verb; associated modal verb, negative particle D: obligatory main verb; associated auxiliary verb; negative particle
- 1
It is a quantum particle, behaving in some experiments like a classical particle and in some experiments like a classical wave.
- 2
Which of the following timber products can be recycled? A: plywood B: LVL C: Glulam D: particle board
- 3
Which of the following is not a valid conclusion from Rutherford’s alpha particle scattering experiment? ( )
- 4
What kind of wave does ultrasound belong to and has certain radiation? A: Electromagnetic wave B: Mechanical wave C: Particle wave D: Light wave