Great changes have taken place in Wenzhou. Who can tell _____ in another five years?
A:how it looked like
B:how did it look like
C:what it will be like
D:what will it be like
属于单细胞生物的是( )
某学校为调查高一新生上学路程所需要的时间(单位:分钟),从高一年级新生中随机抽取100名新生按上学所需时间分组:第1组(0,10,第2组(10,20,第3组(20,30,第4组(30,40,第5组(40,50,得到的频率分布直方图如图所示.
如图,已知一次函数y=kx+b的图象,且y>0,则x的取值范围是( )
设是各项为正数的无穷数列,Ai是边长为ai,ai+1的矩形面积(i=1,2,...),则{An}为等比数列的充要条件为( )