高考金卷·2023届高三·D区专用 老高考(一)1生物答案

高考金卷·2023届高三·D区专用 老高考(一)1生物答案，目前衡水金卷先享题网已经汇总了高考金卷·2023届高三·D区专用 老高考(一)1生物答案的各科答案和试卷，更多衡水金卷答案请关注本网站。

3【答案】一cosx2新教材版X·39·【解析】若fx)=cos,则f'(x)=-sinx,f(x)=-cosz,当x∈(0，受)时，e0sx>0,f(x)<0.又cosA>0osB>0,easC>0,所以fA 8 C)≥fA fB) fC,即oms音≥osA osB cosC33所以=3cos A cos B cos C<3cos3=2

54.Hard difficult journeys for schoolchildren55.In2001.56.Because they don't want to go to work or get married at a young age.Because theythink going to school means a better future.To have a better future./..57.By riding his donkey.58.Forty minutes.59.By bike.By bus./..Because it's not only good for my health but also good for the environment./Because it's convenient./..