「2023衡中同卷人教版地理答案 」衡中同卷高三二轮专题卷地理

「2023衡中同卷人教版地理答案 」衡中同卷高三二轮专题卷地理，目前我们已经整理了「2023衡中同卷人教版地理答案 」衡中同卷高三二轮专题卷地理的各科答案和试卷，更多衡中同卷请关注本网站。

18、【详解】(1)当a=0时，f()=3-2xm了x)=2x3到x2,x,·f(0)=1,f()=-4此时，曲线y=(在点(f(》处的切线方程为y-1=-4(x-),即4x+y-5=0rw)=-2r+a）-2(3-2y.2-3x-a）(2)因为=32x2+a,则(x2+a2(x+a)()=(4-a)0由题意可得(a+1)2f()=3-2x/x)=2x+x-4到,解得a=4,x2+4,(x2+4)2列表如下：(-0,-1)-1(-1,4)4(4,+oo)'()十00f(x)增极大值减极小值增所以，函数f()的增区间为(-0，-)、(4，+∞)，单调递减区间为一1,4)。当2时，f(>0,当>时，)<0所以，f(=f(-)=1,f(=f4到=-433xX<

【语篇导读】这是一篇说明文。文章介绍了出土的秦朝兵马俑，并希望现代的技术可以修复这些褪色的兵马俑，恢复其本色。28.B【解析】理解主旨要义。根据第二段中的"Today,the soldiers in Xi'an's terracotta museumare light brown,but they weren't always thiscolor.They began as an army of red,blue,yellow,green,white,.and purple."第三段“New techniquesare now starting to reveal the army's true colors.和最后一段“Once that happens,artists can bringEmperor Qin's army back to life in full color.知，短文主要讲兵马俑的原始颜色。故选B项。29.A【解析】理解具体信息。根据第二段中的“Thepaint disappeared in less time than it takes to boilan egg,taking with it important pieces of history.可知，兵马俑被发现后很快就失去了颜色。故选A项。30.B【解析】词义猜测。根据上文“Before theirdiscovery,the clay soldiers were protected by beingunderground.”和下文“however,the air caused thecoating under the paint to fall off.”可知，空气让包裹在兵马俑外的颜色脱落是因为兵马俑被挖掘了出来。故划线词的意思是“挖掘”。故选B项。31.C【解析】作出判断推理。根据最后一段中的"The next challenge,says Rong,is to find a way toapply the colors to the army again.Once thathappens,artists can bring Emperor Qin's armyback to life in full color.”可知，他会同意“我们应该努力恢复兵马俑原有的色彩”，故选C项。