1—20英语数字

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• “离离原上草，一岁一枯荣；野火烧不尽，春风吹又生．远芳侵古道，晴翠接荒城；又送王孙去，萋萋满别情．”这是唐代诗人白居易的古诗《赋得古原草送别》，请据此诗回答下列问题．（1）该诗描述的生态系统是草原生态系统，由于该生态系统的______较简单，所以其______能力较差，抵抗力稳定性较低．（2）该生态系统的食物网如图，如果图中植物能提供20000KJ的能量，营养级间的能量传递效率为10%～20%，则鹰得到的最低能量值是______．（3）冬季来临，寒冷会刺激狐皮肤内的______感受器，该感受器产生的兴奋传递到下丘脑中的______，在该中枢的调节下，使狐体温保持稳定．若常温下狐产热和散热速率分别为a1、b1冬季时狐产热和散热速率分别为a2、b2，则a1、b1、a2、b2之间的关系可表示为______．（4）该生态系统担负的功能有______．（5）若该生态系统有一物种濒临灭绝，则建立自然保护区，______，是保护该物种的根本措施．
• 一篇英语作业```请懂的帮我解答``谢谢了.You are writing a letter of congratulation to the boy in the passage of Exercise 5.The following are groups of words you would like to say to him1 your high grade,congratulations,inmath,on!2 this term,were not .your cfforts,in vain.3 in all subjects,have you,trying to get an “A”,thought about?4 you,nothing,is,put,impossble,into,it,your heart,if.5even greater,in the future,you,wish!本人英语稀烂```希望有好心人能帮下我```好象写篇作文要包含这5段话里面的单词吧````真心求助
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• 英语翻译1.the forbidden city 2.the three gorges3.the bund 4.shanghai botanial gardens
• 一道很难的高中英语单选题--------------务必高手帮忙28、The man in the lead swung his right arm _____ a signal for us to stop.A：as if to make    B：even if to make    C：as though making    D：even though making1、请选出答案并解释原因；2、请帮忙标准翻译.
• 简单的英语数字写法106 1082 1806 23059 1001 10001这几种用英语怎么说,请写下来.
• 用英语怎么读数字20