We must adhere to (坚持)the________that everyone must be treated fairly.
A. principle
B. principal
C. property
D. procedure
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3. This difficulty did not in the least shake his ________.
A. thought
B. opinion
C. determination
D. idea
4. The ancient Egyptians ________the hour as one-twelfth of the time from dawn to dusk (黄昏).
A. imagined
B. measured
C. defended
D. defined
With regard to its population,China is poor in natural __________.
A. sources
B. setting
C. resources
D. environment
9. We must lay a solid____________for the development of our heavy industry.
A. foundation
B. ground
C. bottom
D. fountain