参考答案: (1)教育的社会制约性。 (2)教育的生产性。 (3)教育的历史性。 (4)教育的阶级性。 (5)教育的民族性。
I ________ from the 400 meters in the semifinal.
was elluminated
was elluminating
was eliminating
was eliminated
[解析] 乙酰胆碱能被胆碱酯酶迅速水解。
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