Which method is an appropriate way to determine the cosine of 42 degrees?() [" Double d = Math.cos(42);"," Double d = Math.cosine(42);"," Double d = Math.cos(Math.toRadians(42));"," Double d = Math.cos(Math.toDegrees(42));"," Double d = Math.cosine(Math.toRadians(42));"]
除磷过程中,发酵产酸菌和积磷菌的作用及其关系描述错误的是() ["积磷菌只能利用低级的脂肪酸,不能直接利用大分子有机基质","发酵产酸菌可将大分子物质分解成小分子","积磷菌体内储藏的聚磷的分解是在好氧条件下进行的","在除磷过程中这两类菌是互不可分、密切相关的"]
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