³¯ÑôÇø¸ßÈýÎïÀíÆÚÄ©ÊÔÌâ(2019.1)¼°´ð°¸ - ͼÎÄ(2)

18£®£¨6·Ö£©

ÈçͼËùʾ£¬ÖÊÁ¿Îªm¡¢µçºÉÁ¿ÎªqµÄ´øµçÁ£×Ó£¬ÒÔ³õËÙ¶Èv´ÓPµã´¹Ö±Óڴų¡·½ÏòÉäÈë´Å¸ÐӦǿ¶ÈΪBµÄÔÈÇ¿´Å³¡£¬¾­Àú°ë¸öÔ²ÖÜ£¬´ÓQµãÉä³ö´Å³¡¡£²»¼Æ´øµçÁ£×ÓËùÊÜÖØÁ¦¡£Çó£º

£¨1£©P¡¢QÁ½µã¼äµÄ¾àÀëd£»

£¨2£©Á£×Ó´ÓPµãÔ˶¯µ½QµãËùÓõÄʱ¼ät¡£

19£®£¨7·Ö£©

ÈçͼËùʾ£¬Õæ¿ÕÖÐÓÐÒ»¶Ôˮƽ·ÅÖõÄƽÐнðÊô°å£¬½ðÊô°å¼äµÄµçѹΪU£¬³¤¶ÈΪL£¬¼ä¾àΪd¡£Ò»´øÕýµçµÄÁ£×ÓÒÔËÙ¶Èv0ÑØƽÐÐÓÚ°åÃæµÄ·½ÏòÉäÈëƽÐнðÊô°å¼ä£¬²¢´ÓÁíÒ»²àÉä³ö¡£ÒÑÖª´øµçÁ£×ÓµÄÖÊÁ¿Îªm£¬µçºÉÁ¿Îª+q¡£½ðÊô°å¼äµÄµç³¡¿É¿´×öÔÈÇ¿µç³¡£¬²»¼Æ´øµçÁ£×ÓËùÊÜÖØÁ¦¡£

£¨1£©´øµçÁ£×ÓÉä³öƽÐнðÊô°åʱËÙ¶ÈvµÄ´óС£»

£¨2£©ÔÚ´øµçÁ£×Óͨ¹ýƽÐнðÊô°åµÄ¹ý³ÌÖУ¬µç³¡Á¦Ëù×öµÄ

¹¦W¡£

20£®£¨9·Ö£©

Èçͼ1ËùʾµÄµç·£¬µçÔ´µÄµç¶¯ÊÆΪE¡¢ÄÚ×èΪr£¬RΪ±ä×èÏ䣬µçÁ÷±í¿ÉÊÓΪÀí

Ïëµç±í¡£±ÕºÏ¿ª¹ØS£¬¸Ä±ä±ä×èÏäRµÄ×èÖµ£¬µçÁ÷±íµÄʾÊýIËæÖ®±ä»¯¡£

£¨1£©µ±±ä×èÏäµÄ×èֵΪR1ʱ£¬ÇóµçÁ÷±íµÄʾÊýI1¡£ £¨2£©ÒÔ

11Ϊ×Ý×ø±ê£¬RΪºá×ø±ê£¬ÔÚͼ2Öл­³ö±ä×èÏä×èÖµR±ä»¯¹ý³ÌÖÐ?RͼÏñµÄIIʾÒâͼ£¬²¢·Ö±ð˵Ã÷ͼÏßÓë×ÝÖá½»µãºÍͼÏßбÂʵÄÎïÀíÒâÒ壻

£¨3£©ÔÚ½ðÊôµ¼ÌåÖУ¬×ÔÓɵç×Ó¶¨ÏòÒƶ¯ÐγɵçÁ÷¡£ÒÑÖª×ÔÓɵç×ÓÔÚµ¼ÏßÄÚ¶¨ÏòÒƶ¯ËÙÂÊ

µÄÊýÁ¿¼¶Îª10?5m/s£¬µ«Êµ¼ÊÉÏ£¬±ÕºÏ¿ª¹ØSºó£¬µç·Öм¸ºõ˲¼ä¾ÍÐγÉÁ˵çÁ÷£¬Çë˵Ã÷ÀíÓÉ¡£

ÎïÀíÊÔ¾íµÚ 6 Ò³£¨¹² 11 Ò³£©

21£®£¨15·Ö£©

¶ÔÓÚͬһÎïÀíÎÊÌ⣬³£³£¿ÉÒÔ´Óºê¹ÛÓë΢¹ÛÁ½¸ö²»Í¬½Ç¶È½øÐÐÑо¿£¬ÕÒ³öÆäÄÚÔÚÁªÏµ£¬´Ó¶ø¸ü¼ÓÉî¿ÌµØÀí½âÆäÎïÀí±¾ÖÊ¡£

ÈçͼËùʾ£¬¹Ì¶¨ÓÚͬһˮƽÃæÄڵĹ⻬¡¢Æ½Ðг¤Ö±½ðÊôµ¼¹ì´¦ÓÚÊúÖ±ÏòϵÄÔÈÇ¿´Å³¡ÖУ¬µ¼¹ì×ó¶Ë½ÓÓж¨Öµµç×è¡£´ÖϸºÍ²ÄÖʾùÔȵĽðÊô¸ËMNÔÚÓëÆä´¹Ö±µÄˮƽºãÁ¦×÷ÓÃÏ£¬ÔÚµ¼¹ìÉÏÔÈËÙÏòÓÒÔ˶¯£»½ðÊô¸ËMNʼÖÕÓëµ¼Ïß¿òÐγɱպϵç·£¬Æ䳤¶ÈÇ¡ºÃµÈÓÚƽÐйìµÀµÄ¼ä¾à£¬µ¼¹ìµç×è²»¼Æ¡£

£¨1£©ÒÑÖªÔÈÇ¿´Å³¡µÄ´Å¸ÐÇ¿¶ÈΪB£¬½ðÊô¸ËMNµÄ³¤¶ÈΪL£¬ËÙ¶ÈΪv¡£

a£®Çëͨ¹ý·¨À­µÚµç´Å¸ÐÓ¦¶¨ÂÉÍƵ¼Ö¤Ã÷£¬½ðÊô¸ËMNÇиî´Å¸ÐÏß²úÉúµÄµç¶¯ÊÆ

E?BLv¡£

b£®Çë½áºÏµçÔ´µç¶¯Êƶ¨ÒåʽÍƵ¼Ö¤Ã÷£¬½ðÊô¸ËMNÇиî´Å¸ÐÏß²úÉúµÄµç¶¯ÊÆ

E?BLv¡£

£¨2£©ÒÑÖª¶¨Öµµç×èµÄ×èֵΪR£¬½ðÊô¸ËMNµÄµç×èΪr£¬Ë®Æ½ºãÁ¦ÎªF£¬Ä³¶Îʱ¼äÄÚ£¬

½ðÊô¸ËMNÏòÓÒÔ˶¯¾àÀëΪx¡£

a£®Çë½áºÏÄÜÁ¿Êغ㶨ÂÉ£¬ÇóÕâ¶Îʱ¼äÄÚ½ðÊô¸ËMNÉϲúÉúµÄÈÈÁ¿Q£»

b£®¾­µäÎïÀíѧÈÏΪ£¬ÔÚ½ðÊôµ¼ÌåÖУ¬¶¨ÏòÒƶ¯µÄ×ÔÓɵç×ÓƵ·±µØÓë½ðÊôÀë×Ó·¢Éú

Åöײ£¬°Ñ¶¨ÏòÒƶ¯µÄ¶¯Äܲ»¶Ï´«µÝ¸ø½ðÊôÀë×Ó£¬Ê¹½ðÊôÀë×ÓµÄÈÈÕñ¶¯¼Ó¾ç£¬Òò¶øµ¼ÌåµÄζÈÉý¸ß¡£ÔÚ¿¼ÂÇ´óÁ¿×ÔÓɵç×ÓµÄͳ¼Æ½á¹ûʱ£¬µç×ÓÓë½ðÊôÀë×ÓµÄÅöײ½á¹û¿ÉÊÓΪµ¼Ìå¶Ôµç×ÓÓÐÁ¬ÐøµÄ×èÁ¦¡£

Õ¹¿ªÄãÏëÏóµÄ³á°ò£¬¸ø³öÒ»¸öºÏÀíµÄ×ÔÓɵç×ÓµÄÔ˶¯Ä£ÐÍ£¬²¢ÔÚ´Ë»ù´¡

ÉÏÇóÕâ¶Îʱ¼äÄÚ½ðÊô¸ËMNÉϲúÉúµÄÈÈÁ¿Q¡£

ÎïÀíÊÔ¾íµÚ 7 Ò³£¨¹² 11 Ò³£©

±±¾©Êг¯ÑôÇø2018¡«2019ѧÄê¶ÈµÚһѧÆÚÆÚÄ©ÖÊÁ¿¼ì²â

¸ßÈýÄ꼶ÎïÀí²Î¿¼´ð°¸

2019£®1

µÚÒ»²¿·Ö£¨Ñ¡ÔñÌâ ¹²39·Ö£©

±¾²¿·Ö¹²13СÌ⣬ÿСÌâ3·Ö£¬¹²39·Ö¡£ ÌâºÅ ´ð°¸ 1 C 2 D 3 A 4 A 5 B 6 C 7 C 8 A 9 A 10 B 11 D 12 B 13 D µÚ¶þ²¿·Ö£¨·ÇÑ¡ÔñÌâ ¹²61·Ö£©

±¾²¿·Ö¹²8СÌ⣬¹²61·Ö¡£°Ñ´ð°¸ÌîÔÚ´ðÌ⿨ÏàÓ¦µÄλÖᣠ14£®£¨4·Ö£©

¡Á10¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨2·Ö£© 100¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨2·Ö£©

15£®£¨5·Ö£©

£¨1£©Í¼2¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨2·Ö£© £¨2£©Èô²ÉÓÃͼ1Ëùʾµç·£¬R²â?Rx?RA£¬Ïà¶ÔÎó²î?ͼ2Ëùʾµç·£¬R²â?

R²â?RxRx?RA?2.5%£»Èô²ÉÓÃRxR²â?RxRxRVRx£¬Ïà¶ÔÎó²î???0.17%¡£¿É¼ûͼ2

Rx?RVRxRx?RVËùʾµç·µÄÎó²î½ÏС¡£ ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£©

16£®£¨9·Ö£©

£¨1£©A¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨2·Ö£© C¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨2·Ö£© £¨2£©´ð°¸Èç´ðͼ1Ëùʾ ¡­¡­¡­¡­¡­¡­¡­ £¨2·Ö£© £¨3£©0.27~0.33 ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£©

17£®£¨6·Ö£©

½â£º£¨1£©ÓÉÌâÒâ¿ÉÖª£¬Ô­ÏßȦµçѹµÄÓÐЧֵU1?220V¡£

É踱ÏßȦµçѹµÄÓÐЧֵΪU2£¬ÔòÓÐ

U1n1? U2n2n2U1?55V ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£© n1´ðͼ1

ËùÒÔµçѹ±íµÄ¶ÁÊýU?U2?ÎïÀíÊÔ¾íµÚ 8 Ò³£¨¹² 11 Ò³£©

£¨2£©¸±ÏßȦÖеçÁ÷µÄÓÐЧֵI2? ÒòΪ

I1n2? I2n1U2?2.0A R ËùÒÔµçÁ÷±íµÄ¶ÁÊýI?I1?18£®£¨6·Ö£©

n2I2?0.5A¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£© n1½â£º£¨1£©Éè´øµçÁ£×Ó×öÔÈËÙÔ²ÖÜÔ˶¯µÄ¹ì¼£°ë¾¶Îªr¡£¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÓÐ

v2 qvB?m

rmv ËùÒÔ r?

qB ËùÒÔ d?2r?2mv¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£© qB £¨2£©Á£×Ó×öÔ²ÖÜÔ˶¯µÄÖÜÆÚ T?2¦Ðr2¦Ðm? vqB1¦Ðm ËùÒÔ t?T?¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£©

2qB

19£®£¨7·Ö£©

½â£º£¨1£©Æ½ÐнðÊô°å¼äÔÈÇ¿µç³¡³¡Ç¿E?U dÔÚƽÐнðÊô°åµÄ·½Ïò£¬´øµçÁ£×ÓÒÔËÙ¶Èv0×öÔÈËÙÖ±ÏßÔ˶¯£¬ÔòÓÐ

t?L v0 ÔÚ´¹Ö±½ðÊô°åµÄ·½Ïò£¬´øµçÁ£×Ó×ö³õËÙ¶ÈΪÁãµÄÔȼÓËÙÔ˶¯£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÓÐ

qEqU ?mmdqUL ËùÒÔ v??at?

mdv0 a?q2U2L2 ËùÒÔ v?v?v?v?222¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨4·Ö£©

mdv0202?20 £¨2£©¸ù¾Ý¶¯ÄÜÀí¿ÉÇóµÃ£¬µç³¡Á¦Ëù×öµÄ¹¦

1212q2U2L2 W?mv?mv0?¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£© 2222md2v0

20£®£¨9·Ö£©

½â£º£¨1£©¸ù¾Ý±ÕºÏµç·ŷķ¶¨ÂÉÓÐ

ÎïÀíÊÔ¾íµÚ 9 Ò³£¨¹² 11 Ò³£©

I1?E¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£© R1?r £¨2£©U-IͼÏñÈç´ðͼ2Ëùʾ¡£Í¼ÏñÓë×ÝÖá½»µãµÄ×ø±êֵΪ

бÂÊΪ

r1?£¬EI¶Ì1¡£¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£© E £¨3£©±ÕºÏ¿ª¹ØµÄ˲¼ä£¬µç·Öеĸ÷¸öλÖÃѸËÙ½¨Á¢Á˵糡£¬Ôڵ糡

µÄ×÷ÓÃÏ£¬µç·Öи÷´¦µÄ×ÔÓɵç×Ó¼¸ºõͬʱ¿ªÊ¼¶¨ÏòÒƶ¯£¬Õû¸öµç·Ҳ¾Í¼¸ºõͬʱÐγÉÁ˵çÁ÷¡£¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£©

21£®£¨15·Ö£©

½â£º£¨1£©a£®ÔÚ?tʱ¼äÄÚ£¬½ðÊô¸ËMNµÄλÒÆx?v??t

±ÕºÏµç·Ãæ»ýµÄ±ä»¯Á¿ÊÇ?S?Lx?Lv??t

Ôò´©¹ý±ÕºÏµç·µÄ´ÅͨÁ¿µÄ±ä»¯Á¿ÊÇ???B??S?BLv??t

¸ù¾Ý·¨À­µÚµç´Å¸ÐÓ¦¶¨ÂÉÓÐE?´ðͼ2

??£¨3·Ö£© ?BLv¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­

?tb£®½ðÊô¸ËMNÇиî´Å¸ÐÏßʱ£¬MNÏ൱ÓÚµçÔ´£¬ÓÉÓÒÊÖ¶¨Ôò¿ÉÒÔÅжÏMΪÕý¼«£¬NΪ¸º¼«¡£

ÒòΪ½ðÊô¸ËMNµÄÔ˶¯£¬×ÔÓɵç×ÓÊܵ½ÑؽðÊô¸Ë·½ÏòÂåµÄÂ××ÈÁ¦£¨·ÖÁ¦£©f1µÄ×÷Óã¬f1³äµ±·Ç¾²µçÁ¦¡£Éè×ÔÓɵç×ӵĵçºÉÁ¿Îªe£¬ÔòÓÐf1?evB¡£

ÔÚ×ÔÓɵç×ÓÓÉN¶¨ÏòÒƶ¯µ½MµÄ¹ý³ÌÖУ¬f1×öµÄ¹¦W?f1L?evBL£¬ËùÒÔµ¼ÏßMNÇиî´Å¸ÐÏß²úÉúµÄµç¶¯ÊÆE?W?BLv¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£© e £¨2£©a£®Éèµç×èRÉϲúÉúµÄÈÈÁ¿ÎªQR£¬¸ù¾ÝÄÜÁ¿Êغ㶨ÂÉÓÐFx?QR?Q ÓÖÒòΪ

QRR? QrFxr ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨4·Ö£© R?r b£®Éè´Å³¡µÄ´Å¸ÐÇ¿¶ÈΪB£¬½ðÊô¸ËMNµÄ³¤¶ÈΪL£¬Ôò½ðÊô¸ËMNÇиî´Å¸ÐÏß²ú ËùÒÔ Q?ÉúµÄµç¶¯ÊÆE?BLv£¬ËùÒÔ½ðÊô¸ËMNÁ½¶ËµÄµçÊƲîUMN? ½ðÊô¸ËMNÖеĵ糡¿ÉÊÓΪÔÈÇ¿µç³¡£¬Æ䳡ǿE³¡? ×ÔÓɵç×ÓÔÚ½ðÊô¸ËMNÖÐËùÊܵĵ糡Á¦Fe?eE³¡?BLvR R?rUMNBvR ?LR?reBvR R?r ÒòΪ½ðÊô¸ËMNµÄÔ˶¯£¬×ÔÓɵç×ÓÊܵ½ÑؽðÊô¸Ë·½ÏòµÄÂåÂ××ÈÁ¦£¨·ÖÁ¦£©f1?evB ÒòΪ½ðÊô¸ËÖеĵçÁ÷²»±ä£¬ËùÒԿɼÙÉè×ÔÓɵç×ÓÒÔËÙ¶ÈuÏà¶Ôµ¼Ïß×öÔÈËÙÖ±

ÏßÔ˶¯¡£¼ÙÉèµ¼Ìå¶Ôÿ¸öµç×ÓµÄ×èÁ¦¶¼Îªf×è¡£ÔÚÑؽðÊô¸ËMNµÄ·½Ïò£¬¸ù¾Ý

ÎïÀíÊÔ¾íµÚ 10 Ò³£¨¹² 11 Ò³£©

Å£¶ÙµÚ¶þ¶¨ÂÉÓÐf1?(Fe?f×è)?0£¬¼´evB? ËùÒÔ

eBvR?f×è?0 R?rf×è?evBr R?revBrrvtrx?NeuB?NeuB R?rR?rR?r ÉèMNÖÐ×ÔÓɵçºÉµÄÊýÁ¿ÎªN£¬Õâ¶Îʱ¼äΪt£¬Ôò×ÔÓɵç×Ó¿Ë·þf×è×öµÄ×ܹ¦ W¿Ë?Nf×èut?Nut ÒòΪ×ÔÓɵç×ÓÒÔËÙ¶ÈuÏà¶Ôµ¼Ïß×öÔÈËÙÖ±ÏßÔ˶¯£¬ËùÒÔ×ÔÓɵç×ÓÊܵ½´¹Ö±½ðÊô

¸ËMN·½ÏòµÄÂåÂ××ÈÁ¦£¨·ÖÁ¦£©f2?euB£¬ÔòÓнðÊô¸ËMNËùÊܵݲÅàÁ¦

pFA?Nf2?NeuB

È¡½ðÊô¸ËMNΪÑо¿¶ÔÏ󣬸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÓÐFA?F ËùÒÔ W¿Ë?rFx R?rr Fx¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨5·Ö£©

R?r ÓÉÌâÒâ¿ÉÖª£ºQ?W¿Ë?

ÎïÀíÊÔ¾íµÚ 11 Ò³£¨¹² 11 Ò³£©