单项选择题
The chances of the physical sciences being subject to great changes are the biggest because ______.
- A．contradictory theories keep emerging all the time
B．new information is constantly coming in
C．the direction of their development is difficult to predict
D．our knowledge of the physical world is inaccurate
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相关考题
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单项选择题
The word "paradox" ( Para. 1 ) means" ______ ".
A．implication
B．contradiction
C．interpretation
D．confusion -
单项选择题
We know less about the astronomical universe than we do about any social system because ______.
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 -
单项选择题
The author believes that our knowledge of social systems is more secure than that of physical systems because ______.
A．it is not based on personal experience
B．new discoveries are less likely to occur in social sciences
C．it is based on a fairly representative quantity of data
D．the records of social systems are more reliable
