【单选题】Father told the bad news to all the family ______my grandpa so that he would not be too worried about that.
【单选题】Mark Twain shaped the world’s view of America and made a combination of serious literature and ____
C.
American traditional values
【简答题】某公司的广告费支出 x 与销售额 y (单位:万元)之间有下列对应数据:由资料显示 y 与 x 呈线性相关关系 . x 2 4 5 6 8 y 30 40 60 50 70 根据上表提供的数据得到回归方程 ^ ( y ) = bx + a 中的 b = 6.5,预测销售额为115万元时约需________万元广告费.
【单选题】用最小二乘法估计回归直线方程的系数a、b,使函数Q(a,b) 最小,其中Q(a,b)= [ ]
【单选题】有机磷农药中毒常用的解毒剂有那两种( )
【判断题】公羊传的文本是口授流传的,而对文本的解读,其中的微言大义,也多依口传而来。()
【单选题】Mark Twain shaped the world’s view of America and made a combination of serious literature and _____________.
B.
American traditional values
【判断题】标注组合体的尺寸时,表面交线不需要标注其定位和定形尺寸。
【简答题】The father told his son that when he said some words in anger,his bad temper___________.