The dinner party began ten minutes ago, but Mary didn't ____ ____.
染色体组型是描述一个生物体内所有染色体的大小、形状和数量的图像。 下图是某人的染色体组型,下列说法正确的是( )
下列句子中划横线词的活用情况,与例句中划横线词的用法相同的一项是( )
例句:沛公欲王关中
Everyone would prefer to improve the________of their life by taking part in all kinds of activities.