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在农家书屋出版物分类中，生活类图书主要包括哪些？

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比较新、旧三民主义的不同，分析新三民主义与中共革命纲领的原则区别。

A tank 36 ft. by 36 ft. by 6 ft. is filled with water to a depth of 5 ft. If a bulkhead is placed in the center of the tank running fore-and-aft along the 36-foot axis，how will the value of the moment of inertia of the free surface be affected?（）

A. The moment of inertia would remain unchanged
B. The moment of inertia would be 1/4 its original value
C. The moment of inertia would be 1/2 the original value
D. None of the above

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DMS-T设备的TCR故障解决方法有哪些？

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电报每行不得超过（）字符。

A. 49
B. 59
C. 64
D. 69

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