单项选择题

如下哪一项不常用来表示旋风分离器的性能（）
A、临界直径
B、分离效率
C、允许压降
D、分离因数

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多项选择题
ldentify those trends that are unfavorable from the viewpoint of a bondholder.
A、Market interest rates are steadily rising.
B、The issuing company's interest coverage ratio is steadily rising.
C、The issuing company's net cash flow from operating activities is steadily declining.
D、The issuing company's debt ratio is steadily declining.
问答题
智慧树知到《大学美育（河南财经政法大学）》2023章节测试答案-4
答案：第四章测试

1、刘熙《释名》说：“亭者，停也，人所停集也。”这表明亭的初始功能...