题目

从某高中随机选取5名高三男生,其身高和体重的数据如下表所示: 身高x/cm160165170175180 体重y/kg6366707274 根据上表可得回归直线方程=0.56x+,据此模型预报身高为172 cm的高三男生的体重为( ) A．70.09 kg                                                 B．70.12 kg C．70.55 kg                                                 D．71.05 kg—Why didn't your sister talk with me?—She is a ______ girl. She is afraid to speak in front of others.A.naughtyB.shyC.cleverD.good