【单选题】… Will you go to the meeting for their discussion? … No, ______ invited. I don’t feel like getting involved in their business.
【单选题】I must go there earlier. John has suggested that I ________ an hour before the discussion begins.
【单选题】二次函数 的图像过原点,且它的导函数 的图像是经过第一、二、三象限的一条直线,则函数 的图像的顶点在( )
【单选题】—Sorry, but I must go and catch the plane now.—Can we ______ a time for another discussion?
【单选题】某人体细胞中染色体数目为 49 ,称为( )。
【单选题】I must go there earlier. John has suggested that I _____an hour before the discussion begins.
【单选题】The discussion will go on until all the members reach the point ______they all agree on that issue.
【单选题】---Will you go to the meeting for their discussion? ---No, ______ invited. I don’t feel like getting involved with their business.
【简答题】已知反比例函数 的图像与二次函数 的图像相交于点(2,2). (1)求a和k的值; (2)反比例函数的图像是否经过二次函数图像的顶点,为什么?
【简答题】江苏某小型天然湖泊原有少量鱼类,后改造为人工鱼塘,投饵养殖植食性鱼类和肉食性鱼类,两类鱼均无滤食浮游生物的能力。养殖前后生态调查的数据见下表,请回答下列问题: (1)改为人工鱼塘后,该湖泊生物群落的__________结构发生了显著变化。 (2)从种间关系的角度分析,水生高等植物明显减少的直接原因是_______、_________。 (3)从表中可以推测,与2007年相比,2010年湖水中生物体...