【判断题】Based on this observation that speakers consider the matter of face for themselves and others, Leech (1983) proposes the politeness principle. ()
【简答题】观测值(observation)(名词解释)
【多选题】The steps of conducting an observation in an empirical research include ______.
【简答题】Evidence obtained from observation and experiment isoften used to _____ a scientific theory. A. confirm B. confine C.conform D. conceive