下列叙述，正确的是( )
A：细胞的相对表面积越大，物质交换速率越快，细胞新陈代谢越旺盛
B：细胞的相对表面积越小，物质交换速率越快，细胞新陈代谢越缓慢
C：观察洋葱根尖细胞的有丝分裂，处于分裂间期和中期的细胞数目大致相等
D：观察洋葱根尖细胞的有丝分裂，视野中不同细胞的染色体数目基本相等
My name is Jim. I am a student. At school, I have a good friend. His name is Mike. He is tall. He has short hair. We are classmates, too. We go to school at 7:00 o'clock. We go home at 5:00. It's 3:15 now. It's time to play games. Let's go to the playground. We play football with some boys. Jim and Mike are 。
Could you please tell me the way the London Eye?
下列多项式中不能用平方差公式分解的是（ ）
光滑绝缘的水平面上，两个可视为点电荷，电性相反的小球，由静止释放后的一小段时间内，则下列说法中正确的是（ ）
