2022 英语周报 高考 高考 48答案

21.解:(1)f(x)=2x-sinx,令h(x)=2x-sinx,当x∈[0,m]时,h(x)=2-csx>0,h(x)单调递增,则(x)>h(0)=0,即f(x)>0,则f(x)在[Or上单调递增(2)明,当,∈[,时,不等式f()≥R()有解,即不等式a≤sinx·f(x)有解,令(x)=smnx·f(x),所以k(x)=cosx·f(x)+aInI./(r)因为当x∈,cos r0,/(r)0.sin I0,f(x)>0,所以k(x)>0,k(x)单调递增,所以A()

书面表达命题立意:本文要求考生给同学发一封电子邮件,内容包括:1.陈述长时间在网上学习造成的影响;2.你的建议(控制时间,多种形式相结合等)。该设题有利于考查学生的英语核心素养,该题的命题情景贴近中学生的实际生活,符合当前英语试题命制的趋势和特点。考生应该用英语思维合理表达这两个方面的内容参考范文:Dear classmatesI'm sorry to learn that many of us have spent too much time learning English.op theInternet, which can obviously do harm to our bodies, especially eyesight. Thus, as the representative of English class, I want to offerthe following suggestions to you.First of all, we can limit online study time to thirty ainutme.Secondly, we should combine variousforms of English learning. That's to say, online English yearning should be reasonably combined with offlineEnglish learning. In fact, we have a lot of things to-do besides staying on the Internet, such as doing some written assignments and relaxing ourselveIn short, let's study together healthily and effectivelyLi Hi

以上就是2022 英语周报 高考 高考 48答案，更多英语周报答案请关注本网站。