The two conditions that the effective set meets at the same time are { } and { }.
举一反三
- (4)、 [单选题] (2分) A: sound scientific theory should be one that _________.A、works not only under one set of conditions at one time, but also under the same conditions at other times. B: does not allow any changes even under different conditions. C: can be used for many purposes. D: leave no room for improvement.
- Will the covariance of returns for two common stocks be negative if the actual returns on both stocks tend to be: Above their expected returns Below their expected returns at the same time at the same time （） A: No No B: No Yes C: Yes No
- _____ means the chance occurrence of two things at the same time or place. A: flashback B: coincidence C: suspense
- If two events are mutually exclusive, the probability that they both will occur at the same time is :（） A: 0.50. B: 1.00. C: 0.00.
- If infants learn two languages at the same time, they will have a sense of confusion, thus hindering the speed of the language learning.