科研大佬专属:Best Medical Schools: Research 基层天使特供:Best Medical Schools: Primary Care 排名规则不再搞冷冰冰的数字排名,直接给学校们发"段位徽章"啦!从优等生到待进步区,Tier1到Tier4四个梯度一目了然。一起看看Tier1的院校吧: ■Best M...
newly available to entire classes of people, says Saje Mathieu, a history professor at the University of Minnesota.They included black people whose movements were restricted by Jim Crow Laws (种族歧视法).Cars let them more easily search for e...
过去分词形式 done havingbeendone doing havingdone 分词在句中可以作表语、定语、宾语补足语和状语。过去分词作表语 1.及物动词的过去分词作表语，与句子主语是被动关系，表示主语的状态，既表示被动，又表示完成。(1)Thecupisbroken.茶杯破了。2.不及物动词的过去分词作表语，与句子主语是主动关系，表示主语...
八月对于天文爱好者来说依旧激动人心。继上周英仙座流星雨达到高峰之后,今年连续四个超级月亮的第一个将于8月19日升起。周一东部时间下午2点26分,超级月亮和蓝月亮这一罕见的宇宙组合将达到顶峰。上一次出现这种月相是在2023年8月,而下一...