ÌâÄ¿ÄÚÈÝ
19£®¹ØÓÚÖØÁ¦ÊÆÄܵı仯£¬ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£¨¡¡¡¡£©A£® | ÎïÌåÊÜÀÁ¦ºÍÖØÁ¦×÷ÓÃÏòÉÏÔ˶¯£¬ÀÁ¦×ö¹¦ÊÇ1J£¬ÎïÌåÖØÁ¦ÊÆÄܵÄÔö¼ÓÁ¿Ò²Îª1J | |
B£® | ´Óͬһ¸ß¶È½«Ò»Ä³ÎïÌåÒÔÏàͬµÄËÙÂÊƽÅ×»òбÅ×£¬Âäµ½µØÃæÉÏʱ£¬ÎïÌåÖØÁ¦ÊÆÄܵı仯һ¶¨²»Ïàͬ | |
C£® | ´Óͬһ¸ß¶ÈÂäϵÄÎïÌåµ½´ïµØÃ棬¿¼ÂÇ¿ÕÆø×èÁ¦ºÍ²»¿¼ÂÇ¿ÕÆø×èÁ¦µÄÇé¿öÏ£¬ÖØÁ¦ÊÆÄܵļõÉÙÁ¿Ò»¶¨Ïàͬ | |
D£® | ÎïÌåÔ˶¯ÖÐÖØÁ¦×ö¹¦ÊÇ-1J£¬µ«ÎïÌåÖØÁ¦ÊÆÄܵÄÔö¼ÓÁ¿²»Ò»¶¨ÊÇ1J |
·ÖÎö ÖØÁ¦ÊÆÄܵÄÔö¼ÓÁ¿µÈÓÚ¿Ë·þÖØÁ¦×öµÄ¹¦£»ÔÈËÙÏòÉÏÔ˶¯Ê±ÀÁ¦´óСµÈÓÚÖØÁ¦£»ÖØÁ¦×öµÄ¹¦Ö»ÓëÖØÁ¦´óСºÍ³õÄ©¸ß¶È²îÓйأ¬ÓëÆäËüÁ¦ÊÇ·ñ×ö¹¦Î޹أ®
½â´ð ½â£ºA¡¢ÖØÁ¦ÊÆÄܵÄÔö¼ÓÁ¿µÈÓÚ¿Ë·þÖØÁ¦×öµÄ¹¦£»ÎïÌåÊÜÀÁ¦×÷ÓÃÏòÉÏÔ˶¯£¬ÀÁ¦×ö¹¦1J£¬µ«ÎïÌåÖØÁ¦ÊÆÄܵÄÔö¼ÓÁ¿²»Ò»¶¨ÊÇ1J£¬Ö»ÓÐÔÈËÙÉÏÉýʱ£¬ÖØÁ¦µÈÓÚÀÁ¦£¬ÔòÖØÁ¦×öµÄ¹¦ÓëÀÁ¦×öµÄ¹¦ÏàµÈ£¬´Ëʱ²ÅÓÐÎïÌåÖØÁ¦ÊÆÄܵÄÔö¼ÓÁ¿µÈÓÚ1J£¬¹ÊA´íÎó£»
B¡¢ÖØÁ¦ÊÆÄܵı仯Á¿È¡¾öÓڸ߶ȵı仯£»²»ÂÛÎïÌåÔõÑùÅ׳ö£¬ÎïÌåµÄÖØÁ¦ÊÆÄܱ仯Á¿ÊÇÏàͬµÄ£»¹ÊB´íÎó£»
C¡¢´Óͬһ¸ß¶ÈÂäϵÄÎïÌåµ½´ïµØÃ棬ÓÉÓÚÏÂÂäµÄ¸ß¶ÈÏàͬ£¬¹ÊÎÞÂÛÊÇ·ñÊÜĦ²ÁÁ¦ºÍ×èÁ¦£»ÖØÁ¦ÊÆÄܵļõÉÙÁ¿ÊÇÏàͬµÄ£»¹ÊCÕýÈ·£»
D¡¢ÖØÁ¦×ö¹¦µÈÓÚÖØÁ¦ÊÆÄܵĸıäÁ¿£»¹ÊÖØÁ¦×ö¸ºµÄ1JµÄ¹¦£¬ÖØÁ¦ÊÆÄÜÔö¼Ó1J£»¹ÊD´íÎó£»
¹ÊÑ¡£ºC£®
µãÆÀ ±¾ÌâÖص㿼²éÁËÖØÁ¦×ö¹¦ÓëÖØÁ¦ÊÆÄܱ仯Á¿µÄ¹Øϵ£¬×¢ÒâÃ÷È·ÖØÁ¦ÊÆÄܵÄÔö¼ÓÁ¿ÓÀÔ¶µÈÓÚ¿Ë·þÖØÁ¦×öµÄ¹¦£®
A£® | R | B£® | 2R | C£® | 3R | D£® | 4R |
A£® | $v=\frac{dn}{s}$ | B£® | v=$\frac{{d}^{2}n}{s}$ | C£® | v=$\frac{¦Ð{d}^{2}n}{s}$ | D£® | v=$\frac{¦Ð{d}^{2}n}{2s}$ |
A£® | ƽ¾ùËٶȡ¢Ë²Ê±ËٶȺͼÓËٶȶ¼ÊÇʸÁ¿£¬ËÙÂÊ¡¢Æ½¾ùËÙÂÊ¡¢Ê±¼äºÍÖÊÁ¿¶¼ÊDZêÁ¿ | |
B£® | ±È½ÏʸÁ¿´óС£¬Ö»Òª±È½ÏÖµµÄ´óС£¬¶ø±È½Ï±êÁ¿µÄ´óСҪ´ø£¨+¡¢-£©·ûºÅ½øÐÐ | |
C£® | ʸÁ¿µÄºÏ³ÉÂú×ãƽÐÐËıßÐη¨Ôò£¬±êÁ¿µÄºÏ³ÉÖ»Òª´úÊý¼Ó¼õ¼´¿É | |
D£® | ʸÁ¿ºÍ±êÁ¿Ã»ÓÐÑϸñµÄÇø±ð£¬Í¬Ò»¸öÎïÀíÁ¿ÓÐʱÊÇʸÁ¿£¬ÓÐʱÊDZêÁ¿ |
A£® | ¦ÕM=¦ÕN | B£® | ¦ÕM£¾¦ÕN | C£® | EM£¾EN | D£® | EM£¼EN |
A£® | aA£¾aB£¾aC£¾aD | B£® | aA=aC£¾aB£¾aD | C£® | aA=aC£¾aD£¾aB | D£® | aA=aC£¾aB=aD |
A£® | ˮƽ·çÁ¦´óСΪ0.8N | |
B£® | Éþ×ÓÀÁ¦´óСΪ1.0N | |
C£® | µØÃæÊܵ½Ä¦²ÁÁ¦Îª0.6N | |
D£® | Èôˮƽ·çÁ¦±ä´ó£¬¸Ãͬѧ¶ÔµØÃæµÄѹÁ¦½«±£³Ö²»±ä |
A£® | $\frac{G}{2}$ | B£® | $\frac{G}{3}$ | C£® | $\frac{G}{4}$ | D£® | $\frac{G}{9}$ |