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搜题
单选题】
使用检索式“methanol gasoline OR ethanol OR gasanol”进行检索,会出现以下哪种结果?
A.
methanol gasoline,ethanol,gasanol必须同时出现
B.
methanol gasoline,ethanol,gasanol出现一个即可
C.
methanol gasoline,ethanol,gasanol都不出现
D.
methanol gasoline,ethanol,gasanol必须出现两个
参考答案:
B
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