题目内容

燕子去了，有再来的时候；杨柳枯了，有再青的时候；桃花谢了，有再开的时候；但是，聪明的，你告诉我，我们的日子为什么一去不复返呢？上面一段话在句式使用上有什么特色？请加以分析并简要说明其表达效果。

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转辙机转换中途，尖轨移动受阻时，摩擦空转消耗电动机（）被切断前的输出转矩，以保护电动机不被烧毁。

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开挖瓦斯隧道，一律使用（），严禁使用干式凿岩。

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运动时补碳水化合物，正常的摄取量是每30分钟摄（）克。

A. 15-20
B. 15-25
C. 15-30
D. 15-35

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When troubleshooting an EIGRP connectivity problem, you notice that two connected EIGRP routers are not becoming EIGRP neighbors. A ping between the two routers was successful.What is the next thing that should be checked?（）

A. Verify that the EIGRP hello and hold timers match exactly.
B. Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip EIGRP peer command.
C. Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip EIGRP traffic command.
D. Verify that EIGRP is enabled for the appropriate networks on the local and neighboring router.

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