Warning: Array to string conversion in /www/wwwroot/iqti.cn/wp-content/plugins/wpjam-basic/components/wpjam-basic.php on line 174
Warning: Array to string conversion in /www/wwwroot/iqti.cn/wp-content/plugins/wpjam-basic/components/wpjam-basic.php on line 174
Warning: Array to string conversion in /www/wwwroot/iqti.cn/wp-content/plugins/wpjam-basic/components/wpjam-basic.php on line 174 一头牛一年吃三公顷的牧草,现有面积三十公顷的牧场养了五头牛,请问需要多久才能全部吃完?-IQ题