¡¾18Ì×ÊÔ¾íºÏ¼¯¡¿¹ãÎ÷ÄÏÄþÊйãÎ÷´óѧ¸½ÊôÖÐѧ2019½ìÖп¼ÊýѧÎåУÁª¿¼Ä£ÄâÊÔ¾í¼°´ð°¸ ÏÂÔØ±¾ÎÄ

Öп¼ÊýѧģÄâÊÔ¾íº¬´ð°¸

×¢ÒâÊÂÏ

1. ´ðÌâǰ£¬¿¼ÉúÏȽ«×Ô¼ºµÄÐÕÃû¡¢×¼¿¼Ö¤ºÅÌîдÇå³þ£¬½«ÌõÐÎÂë׼ȷճÌùÔÚ¿¼ÉúÐÅÏ¢ÌõÐÎÂëÕ³ÌùÇø¡£ 2£®Ñ¡ÔñÌâ±ØÐëʹÓÃ2BǦ±ÊÌîÍ¿£»·ÇÑ¡ÔñÌâ±ØÐëʹÓÃ0.5ºÁÃ׺ÚÉ«×Ö¼£µÄÇ©×Ö±ÊÊéд£¬×ÖÌ幤Õû¡¢±Ê¼£Çå³þ¡£ 3£®Çë°´ÕÕÌâºÅ˳ÐòÔÚ¸÷ÌâÄ¿µÄ´ðÌâÇøÓòÄÚ×÷´ð£¬³¬³ö´ðÌâÇøÓòÊéдµÄ´ð°¸ÎÞЧ£»ÔڲݸåÖ½¡¢ÊÔÌâ¾íÉÏ´ðÌâÎÞЧ¡£ 4£®±£³Ö¿¨ÃæÇå½à£¬²»ÒªÕÛµþ£¬²»ÒªÅªÆÆ¡¢ÅªÖ壬²»×¼Ê¹ÓÃÍ¿¸ÄÒº¡¢ÐÞÕý´ø¡¢¹ÎÖ½µ¶¡£

Ò»¡¢Ñ¡ÔñÌ⣨¹²10СÌ⣬ÿСÌâ3·Ö£¬¹²30·Ö£©

1£®Î人µØÇøÄ³ÈÕ×î¸ßÆøÎÂ21¡æ£¬×îµÍ12¡æ£¬×î¸ßÆøÎ±È×îµÍÆøÎ¸ߣ¨ £© A£®33¡æ B£®22¡æ C£®11¡æ D£®9¡æ 2£®Èô´úÊýʽ

1ÔÚʵÊý·¶Î§ÄÚÓÐÒâÒ壬ÔòʵÊýxµÄȡֵ·¶Î§ÊÇ£¨ £© x?1A£®x£¾£­1 B£®x£½£­1 C£®x¡Ù0 D£®x¡Ù£­1

22

3£®¼ÆËãx£­2xµÄ½á¹û£¨ £©

2 2 4

A£®£­1 B£®£­xC£®xD£®x

4£®Ï±í¼Ç¼ÁËÒ»ÃûÉè¼ÆÔ˶¯Ô±ÔÚͬһÌõ¼þϵÄÉä»÷³É¼¨£¬ÕâÃûÉä»÷Ô˶¯Ô±Éä»÷Ò»´Î£¬Éä»÷ÖеĸÅÂÊÔ¼ÊÇ£¨ £©

Éä»÷´ÎÊý ¡°ÉäÖÐ9»·ÒÔÉÏ¡±µÄ´ÎÊý ¡°ÉäÖÐ9»·ÒÔÉÏ¡±µÄƵÂÊ 100 88 0.88 150 96 0.64 200 136 0.68 500 345 0.69 D£®0.9 D£®x£­x£­2 D£®(3£¬£­2)

2

800 546 0.68 1000 701 0.70 A£®0.6 B£®0.8 C£®0.7 5£®¼ÆËã(x£«1)(x£­2)µÄ½á¹ûÊÇ£¨ £©

222

A£®x£­2 B£®x£«2 C£®x£­x£«2 6£®µãA(2£¬£­3)¹ØÓÚxÖá¶Ô³ÆµÄµãµÄ×ø±êÊÇ£¨ £©

A£®(2£¬3) B£®(£­2£¬£­3) C£®(2£¬£­3) 7£®Èçͼ£¬ÏÂÁÐÑ¡ÏîÖв»ÊÇ×ó±ßÕýÁùÀâÖùµÄÈýÊÓͼµÄÊÇ£¨ £©

A B

4 2 C 5 6 6 5 D

7 4 8 3 8£®Ä³³µ¼ä20Ãû¹¤ÈËÈÕ¼Ó¹¤Áã¼þÊýÈçϱíËùʾ ÈÕ¼Ó¹¤Áã¼þÊý ÈËÊý ÕâЩ¹¤ÈËÈÕ¼Ó¹¤Áã¼þÊýµÄÖÚÊý¡¢ÖÐλÊý¡¢Æ½¾ùÊý·Ö±ðÊÇ£¨ £© A£®5¡¢6¡¢5 B£®5¡¢5¡¢6 C£®6¡¢5¡¢6 D£®5¡¢6¡¢6

9£®¹Û²ìÏÂÁÐÒ»×éͼÐÎÖеãµÄ¸öÊý£¬ÆäÖеÚ1¸öͼÖй²ÓÐ4¸öµã£¬µÚ2¸öͼÖй²ÓÐ10¸öµã£¬µÚ3¸öͼÖй²ÓÐ19¸öµã£¬¡­¡­£¬°´´Ë¹æÂɵÚ5¸öͼÖй²ÓеãµÄ¸öÊýÊÇ£¨ £©

A£®31 B£®46 C£®51 D£®66

10£®Èçͼ£¬¡÷ABCÄÚ½ÓÓÚ¡ÑO£¬ADÊÇ¡÷ABC±ßBCÉϵĸߣ¬DΪ´¹×㣮ÈôBD£½1£¬AD£½3£¬BC£½7£¬Ôò¡ÑOµÄ°ë¾¶ÊÇ£¨ £©

A£®

25 5 B£®

210 5 C£®

52 2 D£®

310 2¶þ¡¢Ìî¿ÕÌ⣨±¾´óÌâ¹²6¸öСÌ⣬ÿСÌâ3·Ö£¬¹²18·Ö£© 11£®¼ÆË㣺33?23µÄ½á¹ûÊÇ___________ 12£®¼ÆËã

x?11?µÄ½á¹ûÊÇ___________ xx13£®Í¬Ê±ÖÀÁ½Ã¶ÖʵؾùÔȵÄÕý·½Ìå÷»×Ó£¬ÆäÁù¸öÃæÉÏ·Ö±ð¿ÌÓÐ1¡¢2¡¢3¡¢4¡¢5¡¢6Áù¸öÊý×Ö£¬ÔòÁ½Ã¶÷»×ÓÏòÉÏÒ»

ÃæµÄÊý×ÖÏàͬµÄ¸ÅÂÊÊÇ___________

14£®Èçͼ£¬ÔÚÆ½ÐÐËıßÐÎABCDÖУ¬µãEΪBCÖе㣬ÇÒAB£½AE£®ÈôAEƽ·Ö¡ÏDAB£¬¡ÏEAC£½25¡ã£¬Ôò¡ÏAEDµÄ¶ÈÊýΪ___________

15£®ÒÑÖª£¬ËıßÐÎABCDÖУ¬BC£½CD£¬¡ÏBCD£½60¡ã£¬AB¡ÍAD£¬AC£½4£¬ÔòËıßÐÎABCDÃæ»ýµÄ×îСֵÊÇ___________

2

16£®ÒÑÖªÅ×ÎïÏßy£½£­x£«bx£«2£­b£¬ÔÚ×Ô±äÁ¿xµÄÖµÂú×㣭1¡Üx¡Ü2µÄÇé¿öÏ£¬º¯ÊýÓÐ×î´óÖµm£¬ÔòmµÄ×îСֵÊÇ___________

Èý¡¢½â´ðÌ⣨¹²8Ì⣬¹²72·Ö£© 17£®£¨±¾Ìâ8·Ö£©½â·½³Ì×é??x?2y?9

3x?2y??1?18£®£¨±¾Ìâ8·Ö£©Èçͼ£¬A¡¢D¡¢B¡¢EËĵã˳´ÎÔÚͬһÌõÖ±ÏßÉÏ£¬AC£½DF£¬BC£½EF£¬AD£½BE

19£®£¨±¾Ìâ8·Ö£©Ä³Ð£ÎªÁËÁ˽â¾ÅÄ꼶ѧÉúÌåÓý²âÊԳɼ¨Çé¿ö£¬ÒÔ¾ÅÄê(1)°àѧÉúµÄÌåÓý²âÊԳɼ¨ÎªÑù±¾£¬°´A¡¢

B¡¢C¡¢DËĸöµÈ¼¶£¨´Ó¸ßµ½µ×£©½øÐÐͳ¼Æ£¬²¢½«Í³¼Æ½á¹û»æÖƳÉÁ½·ù²»ÍêÕûµÄͳ¼ÆÍ¼£¬ÇëÄã½áºÏͼÖÐËù¸øÐÅÏ¢½â´ðÏÂÁÐÎÊÌ⣺

(1) д³öD¼¶Ñ§ÉúµÄÈËÊýռȫ°à×ÜÈËÊýµÄ°Ù·Ö±ÈΪ__________ £¬C¼¶Ñ§ÉúËùÔÚµÄÉÈÐÎÔ²ÐĽǵĶÈÊýΪ__________

(2) ¸Ã°àѧÉúÌåÓý²âÊԳɼ¨µÄÖÐλÊýÂäÔڵȼ¶__________ÄÚ

(3) Èô¸ÃУ¾ÅÄ꼶ѧÉú¹²ÓÐ500ÈË£¬ÇëÄã¹À¼ÆÕâ´Î¿¼ÊÔÖÐA¼¶ºÍB¼¶µÄѧÉú¹²ÓжàÉÙÈË£¿

20£®£¨±¾Ìâ8·Ö£©Ï±íÊÇijµêÁ½ÌìÏúÊÛÁ½ÖÖÉÌÆ·µÄÕÊÄ¿¼Ç¼£¬ÓÉÓÚ×Ö¼£Áʲݣ¬ÎÞ·¨×¼È·±æÈÏ£®µÚ¶þÌìµÄ×ܽð¶îµÄ¸öλÊý×Ö£¬Ö»ÖªµÀÊÇ0»ò5£¬²¢ÇÒÒÑÖªÁ½ÖÖÉÌÆ·µÄµ¥¼Û¾ùΪÕûÊý ×ÜÊýÁ¿£¨µ¥Î»£º¼þ£© A B ×ܽð¶î £¨µ¥Î»£ºÔª£© µÚÒ»Ìì µÚ¶þÌì 30 15 10 10 380 230 (1) ÇëÇó³öA¡¢BÁ½ÖÖÉÌÆ·µÄÏúÊÛ¼Û

(2) ÈôÒ»¼þA²úÆ·µÄ½ø¼ÛΪ8Ôª£¬Ò»¼þB²úÆ·µÄ½ø¼ÛΪ7Ôª£¬Ä³Ìì¹²Âô³öÁ½ÖÖ²úÆ·50¼þ£¬ÇÒÁ½Õß×ÜÀûÈó²»µÍÓÚ80Ôª£¬ÔòÖÁ¶àÏúÊÛBÉÌÆ·¶àÉÙ¼þ£¿ 21£®£¨±¾Ìâ8·Ö£©ÒÑÖª£º¡÷ABCÊDZ߳¤Îª4µÄµÈ±ßÈý½ÇÐΣ¬µãOÔÚ±ßABÉÏ£¬¡ÑO¹ýµãBÇÒ·Ö±ðÓë±ßAB¡¢BCÏཻÓÚµãD¡¢E£¬EF¡ÍAC£¬´¹×ãΪF (1) ÇóÖ¤£ºÖ±ÏßEFÊÇ¡ÑOµÄÇÐÏß

(2) µ±Ö±ÏßDFÓë¡ÑOÏàÇÐʱ£¬Çó¡ÑOµÄ°ë¾¶

22£®£¨±¾Ìâ10·Ö£©ÒÑÖª£¬µãA¡¢B·Ö±ðÊÇxÖá¡¢yÖáÉϵ͝µã£¬A(m£¬0)¡¢B(0£¬n) (1) Èôm£½3£¬n£½1£¬ÒÔABΪ±ß£¬»­µÈ±ß¡÷ABC£¬Ö±½Óд³öµãCµÄ×ø±ê

(2) Èçͼ1£¬Èôm£½£­1£¬n£½2£¬Æ½ÒÆÏß¶ÎAB£¬µ½µÃËıßÐÎABCDÊÇÆ½ÐÐËıßÐΣ¬ÇÒBC£½2AB£®C¡¢DÁ½µãÔÚ·´±ÈÀýº¯Êýy?k£¨x£¼0£©µÄͼÏóÉÏ£¬ÇókµÄÖµ xk£¨x£¼0£©µÄͼÏóÓÚµãT£®ÈôPT¡ÝPR£¬½áºÏº¯ÊýµÄͼÏó£¬Ö±½Óд³önµÄȡֵ·¶x(3) ÔÚ(2)µÄÌõ¼þÏ£¬ÒÑÖªµãP(£­n£¬n)£¨n£¾0£©£¬¹ýµãP×÷ƽÐÐÓÚxÖáµÄÖ±Ïߣ¬½»Ö±Ïßy£½£­x£­1ÓÚR£¬¹ýµãP×÷ƽÐÐÓÚyÖáµÄÖ±Ïߣ¬½»º¯Êýy?Χ

23£®£¨±¾Ìâ10·Ö£©ÔÚ¡õABCDÖУ¬¡ÏABD£½90¡ã£¬¡ÏC£½45¡ã£¬µãEÊDZßBCÉÏÈÎÒâÒ»µã£¬Á¬½ÓAE½»¶Ô½ÇÏßBDÓëµãG

(1) Èçͼ1£¬µ±µãEÊDZßBCµÄÖеãʱ£®ÈôAB£½2£¬ÇóÏß¶ÎAEµÄ³¤

(2) Èçͼ2£¬¹ýµãD×÷Ö±ÏßAEµÄ´¹Ïߣ¬½»±ßBCÓÚµãF£¬Á¬½áGF£¬ÇóÖ¤£ºAG£½DF£«GF

(3) Èçͼ3£¬¹ýµãD×÷Ö±ÏßAEµÄ´¹Ïߣ¬½»±ßBCÓÚµãF£¬Á¬½áGF¡¢AF£¬Ïß¶ÎAFÓë¶Ô½ÇÏßBD½»ÓÚµãO£®ÈôµãOÇ¡ºÃÊÇÏß¶ÎBGµÄÖе㣬Çë̽¾¿Ïß¶ÎDFÓëGFµÄÖ®¼äµÄÊýÁ¿¹ØÏµ£¬²¢ËµÃ÷ÀíÓÉ

24£®£¨±¾Ìâ12·Ö£©Èçͼ1£¬µãPÊÇÅ×ÎïÏßy?12xÔÚµÚ¶þÏóÏÞÄÚµÄÒ»¶¯µã£¬Ö±ÏßPQ£ºy£½kx£­k£«1½»Å×ÎïÏßÓÚÁí4Ò»µãQ

(1) ÇóÖ±ÏßPQ¾­¹ýµÄ¶¨µãAµÄ×ø±ê

(2) Èçͼ1£¬ÈôAP£½3AQ£¬ÇóµãPµÄ×ø±ê

(3) Èçͼ2£¬¹ýµãPµÄÁíÒ»ÌõÖ±Ïß½»yÖáÓÚµãB(0£¬£­1)£¬½»Å×ÎïÏßÓÚÁíÒ»µãC,ÇÒÖ±ÏßCQ¾­¹ý¶¨µãD£¬ÇóS¡÷ABDµÄÃæ»ý

Öп¼ÊýѧһģÊÔ¾í

²Î¿¼´ð°¸¼°ÆÀ·Ö±ê×¼Ò»¡¢Ñ¡Ò»Ñ¡, ±È±È˭ϸÐÄ

1. D 2. D 3. B 4. C 5.D 6.A 7. A 8. D 9.B 10.C

¶þ¡¢ÌîÒ»Ìî, ¿´¿´Ë­×Ðϸ

11.53 12. 1 13.15. 83?8 16. 1

Èý¡¢ ½âÒ»½â, ÊÔÊÔË­¸ü°ô(±¾´óÌâ¹²9СÌ⣬¹²72·Ö)

17.½â£ºÓÉ¢Ù+¢Ú£¬µÃ

4x?8¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­3·Ö ½âÖ®µÃ

1 14. 85¡ã 6x?2¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­4·Ö