县级以上各级人民政府统计机构和有关部门不可以根据农业普查结果,对有关常规统计的历史数据进行修正。
参考答案:错
解析:可以修正。
当k=______时,x2-3kxy-y2+2xy-2与-2x2-3xy+5的差中不含xy项.
Passage 1
Which of the following will not benefit the sales of chips a. Strong demands for mobile phones. b. Increasing sales of personal computers. c. Continuing demands for cars. d. Increasing sales of digital cameras.