题目

某公司位员工的月工资（单位：元）为，，…，，其均值和方差分别为和，若从下月起每位员工的月工资增加元，则这位员工下月工资的均值和方差分别为（ ） A．，                                         B．， C．，                                                    D．，   1.Who is organizing the party? A．The Evans Center on Erie Road． B．The New York City Fire Department． C．The Boys and Girls Club of Lake Shore． D．The New York City Hospital． 2.What is the cheapest way to get to the party? A．By bus．          B．By train．         C．By car．          D．By boat． 3.Which of the following is true about the party? A．Children under 12 are not allowed to attend． B．All drinks for the first guests are free． C．Tickets can only be bought online． D．There are different activities for guests． 4.How much will a family of four(two parents and their 14-year-old twins)Pay to attend the party if they drive and park there? A．90 dollars．       B．110 dollars．       C．120 dollars．      D．140 dollars． 5.What is the main purpose of the poster? A．To raise money for young people． B．To tell people how to get to the party． C．To advertise the dance party． D．To explain the rules of the party．