Itisdifficulttounderstandthiskindof_______calculation.

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It is difficult to understand this kind of _______ calculation. A. intricate B. varied C. indispensable D. equable

参考答案:

Aintricate 错综复杂的,纠缠不清的; varied 不同的,种种的; indispensable 不可缺少的,绝对必要的; equable 变动甚少的,稳定的。 (本解析由学员提供)