题目

New York, September 15. During a heavy rainfall last night a bus carrying 42passengers slipped off the road on Highway 28, killing 36 of the passengersand the driver. A spokesman for the Highway Patrol (巡逻队) which arrivedat the scene shortly after 11:30 p. m.  estimated (估计) that the accident had happened about half an hour before. Theinjured and the dead were sent to the nearest town of Valley View. At the point where the accident happened the road has a three-lane (三条行车线) highway with many curves (弯道). Cause ofthe accident has not been fully found out. 1. In consider在某草原生态系统能量流动过程中，假设羊摄入体内的能量为n，羊粪便中的能量为36%n，呼吸作用散失的能量为48%n，则    A．羊同化的能量为64%n              B．储存在羊体内的能量为52%n C．由羊流向分解者的能量为16%n      D．由羊流向下一营养级的能量为16%n