A：生态系统中的生产者固定的太阳能是流经该系统的总能量
B：在生态系统中，物质循环是生态系统能量流动的载体
C：植物光合作用固定的碳与植物呼吸作用释放的碳基本相等
D：能量在相邻两个营养级之间的传递效率的大小是由这两个营养级的同化量决定的
Her grandmother often her at the school gate.
在实验事实的基础上，通过科学假设和推理得出的物理规律是（ ）
It's seven o'clock in the morning. It's time for breakfast. Jenny's mother is cooking in the kitchen. Jenny would like some milk and bread. Li Ming would like some eggs, bread and juice. After breakfast, Jenny and Li Ming will go to school by bike.
