天一大联考 2022-2023学年高一年级阶段性测试(一)1化学试题答案

天一大联考 2022-2023学年高一年级阶段性测试(一)1化学试题答案，目前大联考答案网已经汇总了天一大联考 2022-2023学年高一年级阶段性测试(一)1化学试题答案的各科答案和试卷，更多全国100所名校答案请关注本网站。

Dear Sir or Madam,I am writing this letter to draw you attention to the community lecture concerning garbage classifica-yourtion.As we all know,garbage classification is of great significant for environmental protection.Wesignificanceshould try our best A make our community an better place.toGarbage classification not only benefits the environment,but reduce the workload of workers.Morereducesimportant it can help us develop a sense of responsibility and form good habits for ourselves.What'simportantlymore,the garbage where is classified can be recycled and turned intovalueresources.which/thatvaluableThe lecture will be held in the hall at 9 am next Sunday.I hope you can come and join in us.Making a contribution to garbage classification,please.MakeYours,Hongqi Community

17.【解析】(1)g(x)=2 sin@x(V5 cOSwx-sin@x 1=2sinxcos ox-2sinx 1=sin2ox cos2@x=2sin(2ox ).32π因为最小正周期T==元，又0>0，所以o=1,即fx)=2sim2x 2,1分|2o所以令2x 受≤2 管≤2 受解得如 后≤< ，e2,所以)的单调送碳区间为：r 名k缸 经1，太eZ.2分3因为e0引时，2ar 君e后2g 名，)=5拾好有三个解，即(2)sin2or 马)=5恰好有三个解，627π20r.π8π所以≤3332分即13π20π15π1315，解得≤0<63641315所以实数)的取值范围是≤0<2分44