Which of the following can NOT be concluded from paragraph 2 and 3？
A. When people face the same phenomena, they will have the same observations.
B. Variations in observation and conclusion are related to human perception.
C. People using the same methods of observation can still make different observations.
D. People often reach different conclusions even when they make the same observations.
【B16】
A. make
B. call
C. have
D. take
What does the passage mainly discuss？
A. The research methods used by scientists.
B. Observation and human perception variation.
C. The relation between hypothesis and observation.
D. The human perceptual mechanism.
【B5】
A. combat
B. rival
C. fight
D. defeat
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