. This theory about the formation of volcano was later ______ by many observations.
举一反三
- Which of the following statements about the arithmetic mean is not always correct? A: The mean is a measure of the middle (centre) of a distribution. B: Half of the observations are on either side of the mean. C: The sum of the deviations from the mean is zero. D: The value of the mean times the number of observations equals the sum of all of the observations.
- An important milestone in the history of embryology development is the formation of A: Essence theory B: Oval theory C: Preformation theory D: Epigenesis
- Which of the following is true according to the video? A: Scientists haven't reach consensus on the origin of water. B: Volcano eruption brought about the water in the original form on the earth. C: The formation of atmosphere helps to entrap the water coming from the collosion of asteroids.
- As for the formation and changes of attitudes, Leon Festinger, an American psychologist, proposed '( )'. A: Theory of participating changes B: Cognitive dissonance theory C: Theory of attitude balance D: Theory of phase transitions
- 89. Later Chomsky has introduced the theory of __________ _____ and binding (GB).