在学校运动会上,有甲、乙、丙三位同学进行百米赛跑,他们的成绩如下表所示.根据表中成绩可知,跑得最快的是 ____同学,这里比较三人运动的快慢采用的 ____相同的条件下比较时间的方法.
参赛者
甲
乙
丙
成绩/s
13.6
13.8
13.7
——2、3、4、5、6、7、8、9、10、11、12____
如图,以A为位似中心,将△ADE放大2倍后,得位似图形△ABC,若s1表示△ADE的面积,s2表示四边形DBCE的面积,则s1:s2=( )
下列关于细胞结构和功能的叙述,错误的是( )
A: What's the matter with you, young man?B: Oh, doctor. I'm not feeling well. ____ I think I will die.A: Die? I don't think so. Take it easy.(放轻松)____ B: Ahh... I must have a terrible illness.A: Em...____ I am sure you will be all right soon.B: But I really feel very terrible. What should I do now?A: ____ B: Is that all?A: You should drink more water and you shouldn't eat spicy(辣的)food.B:____ A: No, you needn't