组织是由____、____和____相同的细胞,联合在一起形成的细胞群.
The match was very fantastic, ______ when White scored at the last moment.
用下列词语造句
①炫耀
②魁梧
两列简谐横波的振幅都是20cm,传播速度大小相同.实线波的频率为2Hz,沿x轴正方向传播,虚线波沿x轴负方向传播.某时刻两列波在如图所示区域相遇,则( )
— shirt is this? Is it Li Liang's?
—No, it's Tiantian's.