单项选择题 None of these______ is an end in itself. They are tentative, experimental. They are movements not towards something definite but away from something definite.

单项选择题 Nxele denounced sorcery, adultery, ______, incest, extortion, and murder; he would not eat prepared food, which he said was unclean, and stopped drinking milk.

单项选择题 The slogan "scientific truth is a matter of social authority" has become dogma to many academic interest groups who have been______ themselves to substitute their authority for that of the, practicing scientists.