【简答题】一般地说，在一个生态系统中，生物种类越多，营养结构越复杂，自动调节的能力就越　　　；营养级越多，在能量流动中消耗的能量就越　　　。

【简答题】IV. 阅读理解：（共20题，每小题2分，共40分）A long time ago, before there was any money (coins or paper money), people got the things that they needed by trading or exchanging. Salt was one of the first items used to e...

【简答题】There are nine of them, so ______ get into the car at the same time.a. they may not at all b. all they may not c. they can’t all d. all they can’t

【简答题】生物体都有一定的结构，除病毒外，生物都是由构成的。

【简答题】We went through a period _______ communications were very difficult in the rural areas. A, which B, whose C, in which D, with which

【单选题】The news that he fought with his coach surprised us, ________?

【简答题】阅读理解。Although there are no state controlled survival courses in Britain or the United States, there are variousindependent organizations offering similar activities. Students can participate (take pa...

【简答题】用所给词的适当形式填空1. To my despair, the doctor _____me_____ in the room for the whole afternoon. (have; wait)2. I ____ my watch ____ because it didn't work.( have ; .repair)3. I can' t____him____noise all th...

【简答题】暑假即将来临。你班同学讨论了假期计划，提出了不同看法。请根据提示写一篇有关讨论的英语短文，并谈谈你的看法。优点缺点待在家中花费少，舒适方便不能亲身了解外界外出旅游增长见识，开阔眼界花费多，旅途不便注意：1. 短文必须写在答题卡的指定区域，词数80——120（不含已写好部分）。 2．短文必须包括表中所列要点，可根据内容分段表达。 3．可适当增加细节，以使行文连贯。 4．参考词汇：眼界——horizo...

【单选题】It is worth pointing out that the mishearing or misunderstanding of instructions in English, and the use of another language, in an international conversation, ______ two recent aircraft accidents.