问题 选择题
下列各式中与多项式x-(y-2z)相等的是(  )
A.x-y+2zB.x-y-2zC.x+y+2zD.2x-y-3z
答案

答案:A

材料分析题

昆明市响应区党委的号召,积极实施“城乡清洁工程”,如今城乡环境大改善。为此一位山歌手唱到:鱼爱江河鸟爱山,蜜蜂最爱百花园;居家就爱环境美,最怕污水泡廊檐。清洁工程利万家,行动就靠你我他;好比端午龙舟赛,船桨下水共同划。

(1)上述歌词体现了我国哪一项基本国策和发展战略?

                                                                                                                                                               

                                                                                                                                                             

(2)“清洁工程利万家”,请你写出其中“利”的具体表现。

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

(3)“清洁工程利万家,行动就靠你我他”。为了家乡环境“洁、齐、美”你能做些什么?

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

单项选择题