【判断题】三相异步电动机转子绕组中的电流是由电磁感应产生的。
【判断题】在配位化合物中,中心原子的配位数不小于配体数目。( )
【判断题】在配位化合物中,中心原子的配位数不小于配体数目
【多选题】一般来说,中央银行的主要职能可概括为( )
【单选题】Halliday proposes a theory of metafunctions of languages, that is ,language has _______, interpersonal and textual functions.
【判断题】Halliday proposes a n abstract system of functions of adults’ language. He clarifies three meta-functions as the ideational, social and textual function.
【简答题】Halliday proposes a theory of metafunctions of language, that is, language has _______ interpersonal and textual functions.
【判断题】所有配合物都可分为内界和外界两部分,配合物中心原子的配位数不小于配体数。( )