【简答题】胃液的主要成分有哪些? 其中 pH 值最低的成分有何作用?
【单选题】( ) reference refers to the reference where the presupposed occurs in the text before the word or expression that is presupposing.
【单选题】On no account______ be removed from the library.
【判断题】Cataphoric reference refers to the reference where the presupposed occurs in the text after the word or expression that is presupposing. ()
【单选题】下列哪项新石器时代的考古学文化遗址不属于黄河流域()
【单选题】Which one is not the type of reference?
B.
demonstrative reference