题目内容

刃倾角的正负影响切屑的排出方向。当刃倾角为正时，切屑流向已加工表面。

A. 对
B. 错

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Up to December 2013, among the over 800 World Heritage Sites listed by UNESCO, China has ___listed, only second to Italy. Among them, _are cultural heritages, _natural heritages, and___dual heritages. These sites are the most essential part of China's valuable and rich tourism resources.

China's spectacular mountain landscapes attract many tourists at home and abroad. Among them, ___,_, _____and Mount Wuyi are most worth visiting.

Four Buddhist mountains in China are _, Mount Wutai, _, and Mount Jiuhua.

Ancient rulers usually paid homage to Mount Huangshan, hoping that their reign would be blessed.

A. 对
B. 错