A.carried
B.taken out
C.observed
D.abided
A.carried
B.taken out
C.observed
D.abided
A.theories of its origin and history are varied
B.our knowledge of it is highly insecure
C.only a very. small sample of it has been observed
D.few scientists are involved in the study of astronomy
If X has the binomial distribution with the number of total trials n=10 and the probability of success. In an experiment, we observed 4 successes, then an estimate of= .
She ' s been reported missing and we ' re checking her movements for the two weeks before she().
A.vanished
B.survived
C.observed
D.revealed
A.theories of its origin and history are varied
B.our knowledge of it is highly insecure
C.only a very small sample of it has been observed
D.few scientists are involved in the study of astronomy
A observed
B abide by
C submitted
D seen
We can conclude from the passage that
A.health is better than wealth.
B.great hopes make great man.
C.prizes affect people"s life expectancy.
D.success in career brings health benefit.
From what Warneken said in the passage, we can infer that ______.
A.no other nonhuman primate can be as altruistic as chimpanzees
B.altruism has never been observed in any nonhuman animals before
C.chimpanzees did not display altruism in their previous experiments
D.it is the first time they have conducted experiments about chimpanzees
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