With the conditions constantly changing, the result of the experiment is not always__________．

A．changeable

B．reliable

C．reasonable

D．variable

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参考答案

答案解析

【参考译文】随着情况不断变化，实验的结果不是总是可信的。
【答案解析】本题考查形容词词义辨析。从情况不断变化，可以推断出结果并非总是可信的，选项B，reliable(可以信任的，可以依赖的)符合句意，为正确选项。changeable，可以变化的，reasonable，合理的，variable，可变的。

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