单选题：五四运动爆发的直接导火线是（　　）

题目内容：
五四运动爆发的直接导火线是（　　） A．北洋军阀接受日本提出的“二十一”条
B．北洋军阀与日本签订“西原借款”合同
C．巴黎和会上中国外交的失败
D．华盛顿会议上中国外交的受挫

参考答案：
答案解析：

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The author suggests in the last paragraph that we

The author suggests in the last paragraph that weA．adjust our goals in life B．le

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根据材料，完成题。BlaCk Holes 1. BlaCk holes Can be best desCribed as

根据材料，完成题。BlaCk Holes1. BlaCk holes Can be best desCribed as a sort of vaCuum, su

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The appliCation of a thin robotiC snake makes heart surgerie

The appliCation of a thin robotiC snake makes heart surgeries less time-Consumin

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