1898年的"百日维新"如昙花一现,只经历103天就夭折了。谭嗣同在慷慨就义前仰天长叹:"有心杀贼,无力回天"。维新派"无力回天"的主要原因是()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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