问题
选择题
生态系统能量流动逐级递减的原因不可能的是[ ]
A．各营养级自身呼吸作用消耗
B．各营养总有一部分未被下一个营养级摄取
C．被摄取后有部分未被同化
D．在生态系统中一种生物往往被多种食物捕食
答案
答案：D
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生态系统能量流动逐级递减的原因不可能的是[ ]
A．各营养级自身呼吸作用消耗
B．各营养总有一部分未被下一个营养级摄取
C．被摄取后有部分未被同化
D．在生态系统中一种生物往往被多种食物捕食
答案：D
Stuart and Steve were twin brothers. Stuart loved to play basketball. But Steve loved to read books. One day Stuart fell and broke his leg he was playing basketball. When they took him to the hospital, the doctor said he wouldn’t be able to play for six months. Steve went him and brought him books on basketball. At first Stuart wasn’t going to read them. Then he began to read them and that there were ways he could play basketball better. He began to think that books weren’t so . When Stuart’s leg started getting better, Steve would help him by going for walks with him. Stuart’s doctor said he could start playing basketball again. Then Stuart showed Steve how to toss (投) for baskets. Steve found that he enjoyed it. Soon Stuart was ready to basketball games. Steve went to games and enjoyed himself. From then on they practiced basketball and read books together. Now you can see, when happens, something good may also happen. Steve showed Stuart about books and Stuart showed Steve about basketball. So please showing others something that you like to do and they may show you something that they like to do. you can find new things to do.
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