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【简答题】
下图是某雌性动物卵巢内细胞的不同分裂时期的示意图(假设该动物的体细胞内有4条染色体)，请根据图分析回答： (1)甲细胞正处于_______分裂后期，经过分裂形成的子细胞名称是________。 (2)依据图中所显示的细胞分裂特征，判断甲、乙、丙、丁、戊这五幅图中，属于减数分裂的有__________。 (3)图示的五个细胞中，具有同源染色体的有_________。 (4)如果图基因A、b分别位于两条非同源染色体上，且其卵原细胞的基因型为AaBb，则该卵原细胞最终产生的生殖细胞的基因型是________。 (5)甲、乙、丙细胞中DNA分子数依次为：____________。
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举一反三
【单选题】(2009,2014)下列凝血因子中,需要维生素K参与其合成的是
A.
因子Ⅲ、因子Ⅶ、因子Ⅹ、因子Ⅺ
B.
因子Ⅰ、因子Ⅲ、因子Ⅷ、因子Ⅻ
C.
因子Ⅱ、因子Ⅶ、因子Ⅸ、因子Ⅹ
D.
因子Ⅴ、因子Ⅷ、因子Ⅸ、因子Ⅺ
【简答题】请写出创建sound类的完整代码?
【单选题】For many people in the United States who are concerned about the cost of heating homes and businesses, wood has become an alternative energy source to coal, oil, and gas. Nevertheless, wood will never...
A.
There are many competing uses for a finite supply of wood, and suppliers give the lumber and paper industries a higher priority than they give individual consumers.
B.
Wood produces thick smoke in burning, and its extensive use in densely populated cities would violate federal antipollution guidelines.
C.
There are relatively narrow limits to how far wood can be trucked before it becomes more economical to burn the gasoline used for transportation instead of the wood.
D.
Most apartment dwellers do not have adequate storage space for the amount of wood necessary to supply energy for heating.
E.
Most commercial users of energy are located within range of a wood supply, and two-thirds of United States homes are located outside of metropolitan areas.
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