题目内容
反刍动物瘤胃液检查时，如果 pH≤4.0，表示多数微生物及纤毛虫死亡，表明严重的消化障碍。
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反刍动物瘤胃液检查时，瘤胃液不需要新鲜采集。
反刍动物瘤胃液检查时，瘤胃液新鲜采集后需要用四层纱布过滤。
is a religious allegory, a narrative in which general concepts such as sin, despair, and faith are represented as people or as aspects of the natural world.
The secret of the success of The Pilgrim’s Progress is probably simple. Its predominant metaphor --- --- is simple and familiar.
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