肉鸡适宜的温度范围是多少？如何掌握施温的原则？
参考答案：
肉鸡适宜的温度范围因周龄而变：第1周为35～32℃，第2周32~29℃，第3周为29~27℃，第4周为27~24℃，从第5周起应为20~25℃，以后一直保持恒定不变。温度高低应根据季节、昼夜、雏鸡日龄、品种等有所变化。施温原则为：小群宜高，大群宜低；密度小宜高，密度大宜低；冬季宜高，夏季宜低；夜晚宜高，白天宜低；阴天宜高，晴天宜低；弱雏宜高，健雏宜低。
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| You must burst into laughter when you hear your friends express their wishes to you by saying:"Good good study,day day up",which is a most interesting sentence.When I first read the similar sentence "Long time no see" from an American friend's Email,I also laughed.I thought it was a perfect __1__ of Chinglish.Later on,my friend told me that it is a standard American __2__.I was too surprised.Her words could not __3__ me at all.So I did a search on www.google,com.To my surprise,there are over 60 thousand web pages __4__"long time no see"．This sentence has been __5__ used in Emails,newspapers or any other __6__ places.Though it is informal,it is part of the language that Americans use daily. __7__,if you type this phrase in Microsoft Word,the software will tell you that the grammar needs correcting. Nobody knows the __8__ of this Chinglish sentence.Some people __9__that it came from Charlie Chan's movies.In the 1930s,Hollywood movie makers successfully __10__ a famous Chinese detective named "Charlie Chan" on wide screens,__11__ liked to teach Americans some Chinese __12__."Long time no see" was his trademark. Soon it became a__13__phrase. Some scholars __14__ America to a huge pot of stew.All kinds of culture are mixed together,and they change the color and taste of each other.Language is usually the first thing to be __15__ in the mixed stew. | |||
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