The four most common purposes of speech are to inform, to convince, to move to action, and to entertain. 这题里面最高级前面有基数词,但是最高级不是唯一的一个吗? 还可以这样用吗? 这里面不用最高级和用最好高级的区别在哪里呢?
请帮我分析下句中, leaving 的用法和意义,以及这句话的含义,谢谢。Here a flat-plate, fixed solar collector at the best average tilt angle toward the south will often suffice, leaving only small efficiency improvements to be achieved by the fairly costly tracking or concentra...