±à¼£ºrichie
2023-08-13 03:18:37
×÷ΪÐí¶àѧÉúÃÎÃÂÒÔÇóµÄÄ¿±ê£¬½øÈëÃûУÊÇËûÃÇ×·Çó׿Խ½ÌÓýµÄµÚÒ»²½¡£È»¶ø£¬ÃûУµÄÕÐÉú¿¼ÊÔÒ»Ö±ÒÔÀ´¶¼±¸ÊܹØ×¢£¬ÆäÖв»¿ÉºöÊÓµÄÊÇÕÐÉúÊÔÌâµÄÄѶÈÓë½âÎö·½·¨¡£±¾ÆªÎÄÕ½«Îª´ó¼ÒÌṩһ·ÝÃûУÕÐÉúÊÔÌâ»ã±àµÄ´ð°¸½âÎö£¬Ï£ÍûÄܶԹã´ó¿¼ÉúÓÐËù°ïÖú¡£
Êýѧ×÷ΪÃûУÕÐÉú¿¼ÊÔÖеÄÖØÒª¿ÆÄ¿£¬ÒªÇóѧÉúÕÆÎÕÔúʵµÄÊýѧ»ù´¡ºÍ½âÌâÄÜÁ¦¡£ÏÂÃæÊÇÒ»µÀµäÐ͵ÄÊýѧÊÔÌ⣺
ÒÑÖªº¯Êý$f(x) = 2^x$ºÍ$g(x) = \log_2 x$£¬Çóº¯Êý$h(x) = f(g(x))$µÄ¶¨ÒåÓò¡£
½âÎö£ºÊ×ÏÈҪȷ¶¨$h(x)$µÄ¶¨ÒåÓò£¬¼´ÐèÒª¿¼ÂÇ$g(x)$µÄ¶¨ÒåÓò¡£ÓÉÓÚ$g(x)$Ϊ¶ÔÊýº¯Êý£¬¶ÔÊýº¯ÊýµÄ¶¨ÒåÓòÐèÒªÂú×ã$x > 0$£¬Òò´Ë$g(x)$µÄ¶¨ÒåÓòΪ$x > 0$¡£½Ó×Å£¬½«$g(x)$µÄ¶¨ÒåÓò´úÈë$h(x)$µÄ±í´ïʽÖпɵãº
$h(x) = f(g(x)) = f(\log_2 x) = 2^{\log_2 x} = x$
ÓÉ´Ë¿ÉÖª£¬$h(x)$µÄ¶¨ÒåÓòÓë$g(x)$µÄ¶¨ÒåÓòÏàͬ£¬¼´$x > 0$¡£
ÓïÎÄ×÷ΪһÃÅ×ÛºÏÐÔ½ÏÇ¿µÄ¿ÆÄ¿£¬ÔÚÃûУÕÐÉú¿¼ÊÔÖÐÕ¼¾ÝÖØÒªµØλ¡£ÏÂÃæÊÇÒ»µÀµäÐ͵ÄÓïÎÄÊÔÌ⣺
ÔĶÁÏÂÃæÕâ¾äÃûÑÔ£º"Êé¼®ÊÇÈËÀà½ø²½µÄ½×ÌÝ¡£"Çë¼òҪ˵˵Äã¶ÔÕâ¾ä»°µÄÀí½â¡£
½âÎö£ºÕâ¾äÃûÑÔÖ¼ÔÚÇ¿µ÷Êé¼®ÔÚÈËÀà½ø²½ÖеÄÖØÒª×÷Óá£Êé¼®×÷ΪһÖÖÔØÌ壬³ÐÔØ×ÅÈËÀà»ýÀÛµÄ֪ʶºÍÖǻۡ£Í¨¹ýÔĶÁÊé¼®£¬ÈËÃÇÄܹ»¿ªÍØÊÓÒ°£¬Ôö³¤¼ûʶ£¬ÕÆÎÕ¸ü¶àµÄ֪ʶºÍ¼¼ÄÜ£¬´Ó¶ø²»¶ÏÌáÉý×Ô¼º£¬ÊµÏÖ¸öÈ˵Ľø²½ºÍ·¢Õ¹¡£Êé¼®»¹Äܹ»°ïÖúÈËÃÇÅàÑøÁ¼ºÃµÄ˼¿¼ÄÜÁ¦ºÍÅúÅÐ˼ά£¬¼¤·¢¸öÈ˵Ĵ´ÔìÁ¦ºÍ´´ÐÂÄÜÁ¦¡£Òò´Ë£¬Êé¼®²»½öÊÇÈËÀà½ø²½µÄ½×ÌÝ£¬¸üÊÇÈËÃÇʵÏÖ×ÔÎÒ¼ÛÖµºÍÉç»á·¢Õ¹µÄÖØÒª¹¤¾ß¡£
Ó¢Óï×÷ΪһÃŹú¼ÊͨÓõÄÓïÑÔ£¬ÔÚÃûУÕÐÉú¿¼ÊÔÖеÄÖØÒªÐÔ²»ÑÔ¶øÓ÷¡£ÏÂÃæÊÇÒ»µÀµäÐ͵ÄÓ¢ÓïÊÔÌ⣺
ÔĶÁÏÂÃæ¶ÌÎÄ£¬²¢»Ø´ðÎÊÌâ¡£
Recently, the issue of climate change has attracted worldwide attention. It is widely believed that human activities contribute significantly to global warming. To tackle this problem, we need to take immediate action. Firstly, we should reduce our carbon footprint by using renewable energy sources and developing energy-efficient technologies. Secondly, we should raise public awareness about the importance of protecting the environment and encourage people to adopt environmentally-friendly lifestyles. Lastly, governments should implement stricter regulations and provide financial incentives to promote sustainable development.
What measures should be taken to tackle the issue of climate change according to the passage?
½âÎö£º¸ù¾Ý¶ÌÎÄÄÚÈÝ£¬ÎÒÃÇ¿ÉÒÔ×ܽá³öÓ¦¶ÔÆøºò±ä»¯ÎÊÌâµÄ¼¸¸ö´ëÊ©¡£Ê×ÏÈ£¬ÎÒÃÇÓ¦¸Ãͨ¹ýʹÓÿÉÔÙÉúÄÜÔ´ºÍ·¢Õ¹½ÚÄܼ¼ÊõÀ´¼õÉÙ̼ÅÅ·ÅÁ¿¡£Æä´Î£¬ÎÒÃÇÓ¦¸ÃÌá¸ß¹«ÖÚ¶Ô»·¾³±£»¤µÄÖØÒªÐÔµÄÈÏʶ£¬²¢¹ÄÀøÈËÃDzÉÈ¡»·±£µÄÉú»î·½Ê½¡£×îºó£¬Õþ¸®Ó¦¸Ãʵʩ¸üÑϸñµÄ·¨¹æ£¬²¢Ìṩ²ÆÕþ¼¤Àø´ëÊ©£¬ÒÔ´Ù½ø¿É³ÖÐø·¢Õ¹¡£ÕâЩ´ëÊ©µÄ×ÛºÏʵʩ¿ÉÒÔÓÐЧµØÓ¦¶ÔÆøºò±ä»¯²¢±£»¤µØÇò»·¾³¡£
ÎïÀí×÷ΪһÃÅʵÑéÐÔºÍÀíÂÛÐÔÏà½áºÏµÄ¿Æѧѧ¿Æ£¬Ò²ÊÇÃûУÕÐÉú¿¼ÊÔÖеĿ¼²éÄÚÈÝÖ®Ò»¡£ÏÂÃæÊÇÒ»µÀµäÐ͵ÄÎïÀíÊÔÌ⣺
ÈçͼËùʾ£¬Ò»¿ÅÖÊÁ¿Îª$m$µÄСÇò´Ó¸ß¶ÈΪ$h$´¦×ÔÓÉÂäÏ£¬ÏÈÓëһˮƽÃæƽÐеĵذåBÅöײ£¬È»ºóµ¯Æ𵽸߶ÈΪ$h_1$´¦£¬ÔÙ´ÎÏÂÂ䣬×îºóÔڵذåAÉϵ¯Æ𵽸߶ÈΪ$h_2$´¦¡£ÉèºöÂÔ¿ÕÆø×èÁ¦£¬ÇóСÇòÔڵذåBºÍµØ°åAÖ®¼äµÄ¸ß¶È²î$h_1 - h_2$ÓëСÇò×ÔÓÉÂäϵĸ߶È$h$Ö®±È¡£
½âÎö£º¸ù¾Ý»úеÄÜÊغ㶨ÂÉ£¬Ð¡ÇòÔÚ×ÔÓÉÂäϺ͵¯Æð¹ý³ÌÖеÄ×Ü»úеÄܱ£³Ö²»±ä¡£¿¼Âǵ½¶¯ÄÜÓëÖØÁ¦ÊÆÄܵÄת»¯£¬¿ÉµÃµ½ÒÔϵÈʽ£º
$mgh = \frac{1}{2} mv_B^2 = \frac{1}{2} mv_A^2$
ÆäÖÐ$v_B$ΪСÇòÅöײµØ°åBʱµÄËٶȣ¬$v_A$ΪСÇòÅöײµØ°åAʱµÄËٶȡ£ÒòΪСÇòÅöײµØ°åºó»á·¢Éúµ¯ÐÔÅöײ£¬ËùÒÔËٶȵĴóС±£³Ö²»±ä¡£¶ø¸ß¶È²î$h_1 - h_2$¼´ÎªÐ¡ÇòÏȺóµ¯ÆðµÄ¸ß¶È²î£¬¿É±íʾΪ£º
$h_1 - h_2 = \frac{v_A^2}{2g} - \frac{v_B^2}{2g}$
½«$v_B$ºÍ$v_A$´úÈëÉÏʽ£¬²¢½áºÏÇ°ÃæµÄµÈʽ£¬¿ÉÒԵõ½×îÖյĽá¹û£º
$h_1 - h_2 = \frac{1}{2g}(2gh - 2gh) = 0$
¼´Ð¡ÇòÔڵذåBºÍµØ°åAÖ®¼äµÄ¸ß¶È²î$h_1 - h_2$ÓëСÇò×ÔÓÉÂäϵĸ߶È$h$Ö®±ÈΪ0¡£
ͨ¹ýÒÔÉϵÄÃûУÕÐÉúÊÔÌâ»ã±à´ð°¸½âÎö£¬ÎÒÃÇ¿ÉÒÔ¿´µ½ÔÚ¸÷¸öѧ¿ÆÁìÓòÖУ¬Ñ§ÉúÐèÒªÕÆÎÕÔúʵµÄ»ù´¡ÖªÊ¶ºÍ½âÌâ·½·¨¡£ÕÐÉúÊÔÌâµÄ½âÎö²»½ö°ïÖúѧÉúÀí½âÌâÄ¿Òâ˼£¬»¹ÅàÑøÁËËûÃǵÄÂ߼˼άºÍ·ÖÎöÄÜÁ¦¡£¶ÔÓÚ¿¼ÉúÀ´Ëµ£¬Í¨¹ý¶àÁ·Ï°£¬¼ÓÇ¿¶ÔÊÔÌâ½âÎöµÄѧϰ£¬Äܹ»¸üºÃµØÓ¦¶ÔÃûУÕÐÉú¿¼ÊÔ£¬ÊµÏÖ×Ô¼ºµÄ½ÌÓýÃÎÏë¡£
ÃâÔðÉùÃ÷£º±¾ÎĽâÎö½ö¹©²Î¿¼£¬Çë¶ÁÕßÔÚÔĶÁʱ½÷É÷Ó¦Óá£
ÃûУСÉý³õÊýѧģÄâÊÔÌâ¼°´ð°¸Ê®Ì×¾«Æ·
2023-08-12 23:25:25ÍþÁ®Ï£¶ûapp (51edu.com)ÔÚ½¨Éè¹ý³ÌÖÐÒýÓÃÁË»¥ÁªÍøÉϵÄһЩÐÅÏ¢×ÊÔ´²¢¶ÔÓÐÃ÷È·À´Ô´µÄÐÅÏ¢×¢Ã÷Á˳ö´¦£¬°æȨ¹éÔ×÷Õß¼°ÔÍøÕ¾ËùÓУ¬Èç¹ûÄú¶Ô±¾Õ¾ÐÅÏ¢×ÊÔ´°æȨµÄ¹éÊôÎÊÌâ´æÓÐÒìÒ飬ÇëÄúÖÂÐÅqinquan#51edu.com(½«#»»³É@)£¬ÎÒÃÇ»áÁ¢¼´×ö³ö´ð¸´²¢¼°Ê±½â¾ö¡£Èç¹ûÄúÈÏΪ±¾Õ¾ÓÐÇÖ·¸ÄúȨÒæµÄÐÐΪ£¬Çë֪ͨÎÒÃÇ£¬ÎÒÃÇÒ»¶¨¸ù¾Ýʵ¼ÊÇé¿ö¼°Ê±´¦Àí¡£