A:达•芬奇
B:哥伦布
C:但丁
D:莎士比亚
一元二次方程x2-5x-6=0的根是( )
某一池塘中有三个优势种群,分别是鳙鱼、浮游动物A和浮游植物B,其中鳙鱼以浮游动物A为食,浮游动物A以浮游植物B为食. 回答下列问题:
The weather here is different from ________ in Beijing, but the people here are as friendly as _________ in Beijing.