【单选题】人们常常要在鱼缸里放养适量的水草,主要目的是( )
【判断题】共产主义义利观就是大公无私、一心为公、公而忘私,我们每个人都要有共产主义义利观,不需要考虑个人利益。
【简答题】She had always been envious ____ her cousin’s long blond hair.
【简答题】She was envious of her wealthy brother because he could a________ to take a holiday in Hawaii.
【单选题】标志着人类结束史前时代的遗存不包括下列哪项
【单选题】His colleagues were envious ______ his promotion.
【简答题】大体上说,生物学的研究同时朝着 和 两个方向发展。 20 世纪 70 年代兴起了以 为核心的现代生物技术。