(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.
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.
举一反三
- （0-10秒） According to the speaker, under what kind of conditions one can consider to live independently by oneself?
- A steady flow is one in which all conditions at any point in a stream remain constant with respect to time, but the conditions may be different at different points.()
- The conditions under which a physical problem can be uniquely determined are called single-valued conditions, which include: A: Initial conditions. B: Boundary conditions. C: Geometric conditions. D: Physical conditions.
- Under which of the following conditions can cells be preserved for a long time? A: -196℃ B: 4℃ C: -20℃ D: -80℃ E: Room temperature.
- Which theory indicate that different situations and conditions require different management approaches and that no one approach works best in all situation? ( )