AIf the experiment succeeds or fails, it will Bprovide us with Cvaluable experience, which is essential to Dimproving our future

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问题 AIf the experiment succeeds or fails, it will Bprovide us with Cvaluable experience, which is essential to Dimproving our future work.

选项 A、
B、
C、
D、

答案A

解析应改为Whether。“whether…or…”是固定搭配。if不能引导主语从句。

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