【单选题】某牛场 35号公牛,它的 18头女儿第一胎平均产奶量为 4453公斤,而女儿的母亲第一胎平均产奶量为 4033公斤;另一头 36号公牛, 2头女儿第一胎平均产奶量为 4036公斤,它们母亲的产奶量为 4200公斤。试问应该选择哪一号公牛留种( )
【单选题】Resources are a fundamental _______ in the development of tourism.
【简答题】阅读理解。 The teacher is giving his students a written examination. He wants them to write a composition (作文). The title is My Dog, no less than 150 words. Little Tom thinks for a moment, then he begins t...
【单选题】In _____ Marx began to learn Russian.
【单选题】Karl Marx began to study Russian in ___.
【单选题】In ______ Marx began to learn Russian.
【简答题】In this part, you are asked to write an essay according to the outline given. Your composition should be about 200 words. Remember to write clearly and logically. After writing, please check your comp...
【单选题】Marx began to learn Russian by himself in _____.
【单选题】In _____ Marx began to learn Russian.
【单选题】无固有的清鲜风味和苹果香气,有轻微异味。这句话是苹果的( )评价要求。