For beginners and elementary learners, a ______ dictionary is es

For beginners and elementary learners, a ______ dictionary is essential as theydo not know enough ofthe target language to understand fully a monolingual dictionary.
【正确答案】：bilingual
【题目解析】：考察对于不同类型的词典的作用。单语词典和双语词典与学习者的语言水平有直接的原因。见课本第184-185页。