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2023學(xué)年度第一學(xué)期期末考試高二數(shù)學(xué)試題一、選擇題:本題共8小題,每小題5分,共40分.在每小題給出的四個(gè)選項(xiàng)中,只有一項(xiàng)是符合題目要求的.1.直線SKIPIF1<0的傾斜角為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】A【解析】【分析】設(shè)直線SKIPIF1<0的傾斜角為SKIPIF1<0,然后利用斜率公式即可【詳解】設(shè)直線SKIPIF1<0的傾斜角為SKIPIF1<0,由SKIPIF1<0可得斜率SKIPIF1<0,即SKIPIF1<0故選:A2.已知圓SKIPIF1<0的方程為SKIPIF1<0,則圓心SKIPIF1<0的坐標(biāo)為()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】C【解析】【分析】將圓SKIPIF1<0的方程轉(zhuǎn)化為標(biāo)準(zhǔn)形式,再得到圓心SKIPIF1<0的坐標(biāo)即可.【詳解】圓SKIPIF1<0的方程為SKIPIF1<0,則圓SKIPIF1<0的標(biāo)準(zhǔn)方程為SKIPIF1<0,所以圓心SKIPIF1<0的坐標(biāo)為SKIPIF1<0.故選:C.3.已知雙曲線SKIPIF1<0,則該雙曲線的離心率為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】C【解析】【分析】根據(jù)雙曲線的方程直接求出離心率即可.【詳解】由雙曲線SKIPIF1<0,可知該雙曲線的離心率SKIPIF1<0.故選:C.4.等差數(shù)列SKIPIF1<0中,已知SKIPIF1<0,SKIPIF1<0,則公差SKIPIF1<0等于A.3 B.-6 C.4 D.-3【答案】B【解析】【分析】利用等差數(shù)列的性質(zhì)SKIPIF1<0,即能求出公差.【詳解】由等差數(shù)列的性質(zhì),得SKIPIF1<0,所以SKIPIF1<0.故選:B.【點(diǎn)睛】本題考查了等差數(shù)列的公差的求法,是基礎(chǔ)題.5.已知點(diǎn)SKIPIF1<0到直線SKIPIF1<0的距離為1,則SKIPIF1<0的值為()A.5或15 B.5或15C.5或15 D.5或15【答案】D【解析】【分析】根據(jù)條件,利用點(diǎn)到直線的距離公式建立關(guān)于SKIPIF1<0的方程,再求出SKIPIF1<0的值.【詳解】因?yàn)辄c(diǎn)SKIPIF1<0到直線SKIPIF1<0的距離為1,所以SKIPIF1<0解得SKIPIF1<0或5.故選:D.6.已知等比數(shù)列SKIPIF1<0的各項(xiàng)均為正數(shù),公比SKIPIF1<0,且滿足SKIPIF1<0,則SKIPIF1<0()A.8 B.4 C.2 D.1【答案】A【解析】【分析】根據(jù)SKIPIF1<0是等比數(shù)列,則通項(xiàng)為SKIPIF1<0,然后根據(jù)條件可解出SKIPIF1<0,進(jìn)而求得SKIPIF1<0【詳解】由SKIPIF1<0為等比數(shù)列,不妨設(shè)首項(xiàng)為SKIPIF1<0由SKIPIF1<0,可得:SKIPIF1<0又SKIPIF1<0,則有:SKIPIF1<0則SKIPIF1<0故選:A7.如圖所示,在平行六面體SKIPIF1<0中,E,F(xiàn),H分別為SKIPIF1<0,SKIPIF1<0,DE的中點(diǎn).若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則向量SKIPIF1<0可用SKIPIF1<0表示為()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】B【解析】【分析】根據(jù)向量的線性運(yùn)算,利用基底SKIPIF1<0表示所求向量即可.【詳解】由題意,SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,故選:B.8.已知橢圓SKIPIF1<0的右焦點(diǎn)SKIPIF1<0與拋物線SKIPIF1<0的焦點(diǎn)重合,過(guò)點(diǎn)SKIPIF1<0的直線交SKIPIF1<0于SKIPIF1<0兩點(diǎn),若SKIPIF1<0的中點(diǎn)坐標(biāo)為SKIPIF1<0,則橢圓SKIPIF1<0方程為()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】A【解析】【分析】結(jié)合中點(diǎn)坐標(biāo)用點(diǎn)差法求得SKIPIF1<0.【詳解】∵SKIPIF1<0,故右焦點(diǎn)SKIPIF1<0,則SKIPIF1<0,設(shè)SKIPIF1<0,則SKIPIF1<0,且SKIPIF1<0,兩式相減得SKIPIF1<0,故SKIPIF1<0,故SKIPIF1<0,故SKIPIF1<0,故橢圓SKIPIF1<0方程為SKIPIF1<0,故選:A.二、選擇題:本題共4小題,每小題5分,共20分.在每小題給出的選項(xiàng)中,有多項(xiàng)符合題目要求.全部選對(duì)的得5分,部分選對(duì)的得2分,有選錯(cuò)的得0分.9.已知非零空間向量SKIPIF1<0,則下列說(shuō)法正確的是()A.若SKIPIF1<0,則SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.若SKIPIF1<0,則SKIPIF1<0不共面【答案】AB【解析】【分析】根據(jù)向量共線定理判斷A;利用數(shù)量積的定義判斷B;根據(jù)平面向量數(shù)量積的定義和運(yùn)算律判斷C;利用平面向量基本定理判斷D【詳解】對(duì)于A,因?yàn)镾KIPIF1<0,SKIPIF1<0,SKIPIF1<0是非零向量,且滿足SKIPIF1<0,SKIPIF1<0,故存在實(shí)數(shù)SKIPIF1<0使得SKIPIF1<0,故SKIPIF1<0,所以SKIPIF1<0,故正確;對(duì)于B,因?yàn)镾KIPIF1<0,SKIPIF1<0,SKIPIF1<0是非零向量,所以SKIPIF1<0,故正確;對(duì)于C,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0與SKIPIF1<0未必共線,故不正確;對(duì)于D,由平面向量基本定理可得若SKIPIF1<0,則SKIPIF1<0共面,故不正確故選:AB10.已知點(diǎn)SKIPIF1<0在圓SKIPIF1<0:SKIPIF1<0上,直線SKIPIF1<0SKIPIF1<0,則()A.直線SKIPIF1<0與圓SKIPIF1<0相交 B.直線SKIPIF1<0與圓SKIPIF1<0相離C.點(diǎn)SKIPIF1<0到直線SKIPIF1<0距離最大值為SKIPIF1<0 D.點(diǎn)SKIPIF1<0到直線SKIPIF1<0距離最小值為SKIPIF1<0【答案】BC【解析】【分析】將圓的方程化為標(biāo)準(zhǔn)式,即可得到圓心坐標(biāo)與半徑,再求出圓心到直線的距離,即可判斷.【詳解】解:圓SKIPIF1<0:SKIPIF1<0,即SKIPIF1<0,圓心為SKIPIF1<0,半徑SKIPIF1<0,則圓心SKIPIF1<0到直線SKIPIF1<0的距離SKIPIF1<0,所以直線SKIPIF1<0與圓SKIPIF1<0相離,又點(diǎn)SKIPIF1<0在圓SKIPIF1<0上,所以點(diǎn)SKIPIF1<0到直線SKIPIF1<0距離最大值為SKIPIF1<0,點(diǎn)SKIPIF1<0到直線SKIPIF1<0距離最小值為SKIPIF1<0,故正確有B、C.故選:BC11.設(shè)SKIPIF1<0為等比數(shù)列SKIPIF1<0的前n項(xiàng)和,已知SKIPIF1<0,SKIPIF1<0,則下列結(jié)論正確的是()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】BD【解析】【分析】根據(jù)等比數(shù)列公式得到SKIPIF1<0,SKIPIF1<0,計(jì)算得到SKIPIF1<0,SKIPIF1<0,對(duì)比選項(xiàng)得到答案.【詳解】SKIPIF1<0,SKIPIF1<0,解得SKIPIF1<0,SKIPIF1<0,故SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,故BD正確,AC錯(cuò)誤.故選:BD.12.已知橢圓SKIPIF1<0的中心為坐標(biāo)原點(diǎn),焦點(diǎn)SKIPIF1<0在SKIPIF1<0軸上,短軸長(zhǎng)等于2,離心率為SKIPIF1<0,過(guò)焦SKIPIF1<0作SKIPIF1<0軸的垂線交橢圓SKIPIF1<0于SKIPIF1<0兩點(diǎn),則下列說(shuō)法正確的是()A.橢圓SKIPIF1<0的方程為SKIPIF1<0 B.橢圓SKIPIF1<0的方程為SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】ACD【解析】【分析】根據(jù)給定條件,求出橢圓SKIPIF1<0的方程,再逐項(xiàng)計(jì)算判斷作答.【詳解】依題意,橢圓SKIPIF1<0方程為SKIPIF1<0,有SKIPIF1<0,由離心率為SKIPIF1<0得:SKIPIF1<0,解得SKIPIF1<0,因此橢圓SKIPIF1<0的方程為SKIPIF1<0,A正確,B不正確;由橢圓的對(duì)稱性不妨令SKIPIF1<0,直線SKIPIF1<0,由SKIPIF1<0得SKIPIF1<0,則SKIPIF1<0,C正確;由選項(xiàng)C知,SKIPIF1<0,由橢圓定義得SKIPIF1<0,D正確.故選:ACD三、填空題:本題共4小題,每小題5分,共20分.13.已知SKIPIF1<0,SKIPIF1<0,則向量SKIPIF1<0的坐標(biāo)為______.【答案】SKIPIF1<0【解析】【分析】空間向量線性運(yùn)算的坐標(biāo)表示,直接求值.【詳解】已知SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0.故答案為:SKIPIF1<014.古希臘著名科學(xué)家畢達(dá)哥拉斯把1,3,6,10,15,21,…這些數(shù)量的(石子),排成一個(gè)個(gè)如圖一樣的等邊三角形,從第二行起每一行都比前一行多1個(gè)石子,像這樣的數(shù)稱為三角形數(shù).那么把三角形數(shù)從小到大排列,第11個(gè)三角形數(shù)是______.【答案】66【解析】【分析】根據(jù)給定信息,求出三角形數(shù)按從小到大排列構(gòu)成數(shù)列的通項(xiàng),即可求解作答.【詳解】依題意,三角形數(shù)按從小到大排列構(gòu)成數(shù)列SKIPIF1<0,則SKIPIF1<0,所以第11個(gè)三角形數(shù)是SKIPIF1<0.故答案為:6615.已知拋物線SKIPIF1<0,直線SKIPIF1<0過(guò)拋物線的焦點(diǎn),直線SKIPIF1<0與拋物線交于SKIPIF1<0兩點(diǎn),弦SKIPIF1<0長(zhǎng)為12,則直線SKIPIF1<0的方程為______.【答案】SKIPIF1<0或SKIPIF1<0【解析】【分析】根據(jù)題意可得拋物線的焦點(diǎn)SKIPIF1<0,設(shè)直線SKIPIF1<0的方程為SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,聯(lián)立直線SKIPIF1<0與拋物線方程,消掉SKIPIF1<0得關(guān)于SKIPIF1<0的一元二次方程,利用韋達(dá)定理可得SKIPIF1<0,由SKIPIF1<0,解得SKIPIF1<0,即可求解.【詳解】解:根據(jù)題意可得拋物線的焦點(diǎn)SKIPIF1<0,根據(jù)題意可得直線SKIPIF1<0的斜率存在,設(shè)直線SKIPIF1<0的方程為SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,聯(lián)立SKIPIF1<0,得SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,因?yàn)镾KIPIF1<0,解得SKIPIF1<0,SKIPIF1<0,則直線SKIPIF1<0的方程為SKIPIF1<0或SKIPIF1<0.故答案為:SKIPIF1<0或SKIPIF1<0.16.數(shù)學(xué)著作《圓錐曲線論》中給出了圓的一種定義:平面內(nèi),到兩個(gè)定點(diǎn)A,B距離之比是常數(shù)SKIPIF1<0(SKIPIF1<0,SKIPIF1<0)的點(diǎn)M的軌跡是圓.若兩定點(diǎn)SKIPIF1<0,SKIPIF1<0,動(dòng)點(diǎn)M滿足SKIPIF1<0,點(diǎn)M的軌跡圍成區(qū)域的面積為______,△ABM面積的最大值為______.【答案】①.SKIPIF1<0②.SKIPIF1<0【解析】【分析】設(shè)動(dòng)點(diǎn)SKIPIF1<0,由SKIPIF1<0結(jié)合兩點(diǎn)距離公式可得得動(dòng)點(diǎn)SKIPIF1<0的軌跡方程為SKIPIF1<0,可得圓心坐標(biāo)和半徑,即可求點(diǎn)M的軌跡圍成區(qū)域的面積;又SKIPIF1<0,只需SKIPIF1<0,即可得△ABM面積的最大值.【詳解】解:設(shè)動(dòng)點(diǎn)SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0,由SKIPIF1<0,即SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,所以動(dòng)點(diǎn)SKIPIF1<0的軌跡方程為SKIPIF1<0,所以點(diǎn)SKIPIF1<0的軌跡是圓且圓心SKIPIF1<0,半徑為SKIPIF1<0,點(diǎn)SKIPIF1<0的軌跡區(qū)域面積SKIPIF1<0;SKIPIF1<0,又SKIPIF1<0,所以SKIPIF1<0,而SKIPIF1<0,SKIPIF1<0的最大值為SKIPIF1<0.故答案為:SKIPIF1<0;SKIPIF1<0.四、解答題:本題共6小題,共70分.解答應(yīng)寫出文字說(shuō)明、證明過(guò)程或演算步驟.17.已知圓SKIPIF1<0的圓心為SKIPIF1<0,且經(jīng)過(guò)點(diǎn)SKIPIF1<0.(1)求圓SKIPIF1<0的標(biāo)準(zhǔn)方程;(2)已知直線SKIPIF1<0與圓SKIPIF1<0相交于SKIPIF1<0兩點(diǎn),求SKIPIF1<0.【答案】(1)SKIPIF1<0(2)SKIPIF1<0【解析】【分析】(1)根據(jù)條件求出圓SKIPIF1<0的半徑,再結(jié)合圓心坐標(biāo)求出標(biāo)準(zhǔn)方程即可;(2)求出圓心SKIPIF1<0到直線SKIPIF1<0的距離,再由垂徑定理求出SKIPIF1<0.【小問(wèn)1詳解】因?yàn)閳ASKIPIF1<0的圓心為SKIPIF1<0,且經(jīng)過(guò)點(diǎn)SKIPIF1<0,所以圓SKIPIF1<0半徑SKIPIF1<0,所以圓SKIPIF1<0的標(biāo)準(zhǔn)方程為SKIPIF1<0.【小問(wèn)2詳解】由(1)知,圓SKIPIF1<0的圓心為SKIPIF1<0,半徑SKIPIF1<0,所以圓心SKIPIF1<0到直線SKIPIF1<0的距離SKIPIF1<0,所以由垂徑定理,得SKIPIF1<0.18.已知數(shù)列SKIPIF1<0的前n項(xiàng)和為SKIPIF1<0,且SKIPIF1<0(1)求SKIPIF1<0的通項(xiàng)公式(2)求證數(shù)列SKIPIF1<0是等差數(shù)列【答案】(1)SKIPIF1<0(2)證明見解析【解析】【分析】(1)根據(jù)SKIPIF1<0,代入即可求出通項(xiàng)公式,注意檢驗(yàn)SKIPIF1<0;(2)由題意得出SKIPIF1<0的通項(xiàng)公式,用后一項(xiàng)減前一項(xiàng)為定值來(lái)證明是等差數(shù)列即可.【小問(wèn)1詳解】解:由題知SKIPIF1<0,SKIPIF1<0當(dāng)SKIPIF1<0時(shí),SKIPIF1<0SKIPIF1<0SKIPIF1<0,將SKIPIF1<0代入上式可得SKIPIF1<0,故SKIPIF1<0時(shí)滿足上式,SKIPIF1<0;【小問(wèn)2詳解】證明:由題知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0是以3為首項(xiàng),1為公差的等差數(shù)列.19.如圖,在棱長(zhǎng)為2的正方體SKIPIF1<0中,SKIPIF1<0分別為SKIPIF1<0的中點(diǎn).(1)求證:SKIPIF1<0;(2)求點(diǎn)SKIPIF1<0到平面SKIPIF1<0的距離.【答案】(1)證明見解析;(2)SKIPIF1<0.【解析】【分析】(1)根據(jù)給定條件,建立空間直角坐標(biāo)系,利用空間位置關(guān)系的向量證明推理作答.(2)利用(1)中坐標(biāo)系,利用空間向量求出點(diǎn)到平面的距離.【小問(wèn)1詳解】在棱長(zhǎng)為2的正方體SKIPIF1<0中,分別以SKIPIF1<0為SKIPIF1<0軸,建立空間直角坐標(biāo)系,如圖,則SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,即有SKIPIF1<0,所以SKIPIF1<0.【小問(wèn)2詳解】由(1)知,SKIPIF1<0,則SKIPIF1<0,設(shè)SKIPIF1<0是平面SKIPIF1<0的法向量,則SKIPIF1<0,令SKIPIF1<0,得SKIPIF1<0,所以點(diǎn)SKIPIF1<0到平面SKIPIF1<0的距離SKIPIF1<0.20.已知SKIPIF1<0,且SKIPIF1<0在直線SKIPIF1<0上,其中SKIPIF1<0是數(shù)列SKIPIF1<0中的第SKIPIF1<0項(xiàng).(1)求數(shù)列SKIPIF1<0的通項(xiàng)公式;(2)設(shè)SKIPIF1<0,求數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和SKIPIF1<0.【答案】(1)SKIPIF1<0;(2)SKIPIF1<0.【解析】【分析】(1)根據(jù)給定條件,求出直線SKIPIF1<0的方程,再代入求解作答.(2)由(1)求出SKIPIF1<0,再利用錯(cuò)位相減法求和作答.【小問(wèn)1詳解】因?yàn)镾KIPIF1<0,則直線SKIPIF1<0的斜率為SKIPIF1<0,直線SKIPIF1<0的方程為:SKIPIF1<0,即SKIPIF1<0,又因?yàn)镾KIPIF1<0在直線SKIPIF1<0上,則有SKIPIF1<0,所以數(shù)列SKIPIF1<0的通項(xiàng)公式是SKIPIF1<0.【小問(wèn)2詳解】由(1)知,SKIPIF1<0,則SKIPIF1<0,于是得SKIPIF1<0,兩式相減得:SKIPIF1<0,所以數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和SKIPIF1<0.21.如圖,SKIPIF1<0底面SKIPIF1<0,SKIPIF1<0底面SKIPIF1<0,四邊形SKIPIF1<0是正方形,SKIPIF1<0.(1)證明:SKIPIF1<0平面SKIPIF1<0;(2)求直線SKIPIF1<0與平面SKIPIF1<0所成角的正切值.【答案】(1)證明見解析;(2)SKIPIF1<0.【解析】【分析】(1)利用線面垂直的性質(zhì)、線面平行的判定推理作答.(2)建立空間直角坐標(biāo)系,利用空間向量求出線面角的正弦即可求解作答.【小問(wèn)1詳解】因?yàn)镾KIPIF1<0底面SKIPIF1<0,SKIPIF1<0底面SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0平面SKIPIF1<0,SKIPIF1<0平面SKIPIF1<0,所以SKIPIF1<0平面SKIPIF1<0.【小問(wèn)2詳解】依題意,SKIPIF1<0兩兩垂直,以SKIPIF1<0為坐標(biāo)原點(diǎn),SKIPIF1<0所在直線分別為SKIPIF1<0軸、SKIPIF1<0軸、SKIPIF1<0軸建立空間直角坐標(biāo)系,如圖,則SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,而SKIPIF1<0平面DCE,即SKIPIF1<0平面SKIPIF1<0,則平面SKIPIF1<0的一個(gè)法向量為SKIPIF1<0,設(shè)直線SKIPIF1<0與平面SKIPIF1<0所成角為SKIPIF1<0,則SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0,所以直線SKIPIF1<0與平面SKIPIF1<0所成角的正切值為SKIPIF1<0.22.已知橢圓SKIPIF1<0:SKIPIF1<0(SKIPIF1<0)的離心率為SKIPIF1<0,其左?右焦點(diǎn)分別為SKIPIF1<0,SKIPIF1<0,SKIPIF1<0為橢圓SKIPIF1<0上任意一點(diǎn),SKIPIF1<0面積的最大值為1.(1)求橢圓SKIPIF1<0的標(biāo)準(zhǔn)方程;(2)已知SKIPIF1<0,過(guò)點(diǎn)SKIPIF1<0的直線SKIPIF1<0與橢圓SKIPIF1<0交于不同的兩點(diǎn)SKIPIF1<0,SKIPIF1<0

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