介绍动物英语—(鱼)
题目
介绍动物英语—(鱼)
快
还有鸟。
答案
Fish
Fish is a kind of animal that lives in the water.There are two types of fish,the fresh water fish and the sea water fish.Fresh water fish,quite obviously,lives in rivers and lakes where they can find fresh water.On the other hand,sea water fish lives in the salty water in the sea.Fish has very high value for human beings.First they are very popular food.People even eat raw fish meat in some place like Japan or Tailand.Second fish is very important for maintaining the balance of the water environment.Fish places a very essential role in the food chain.
Birds
Birds have always been considered as a fascinating creature.Flying is still one of the biggest dreams of humans.Birds inspired us to build airplanes,the fastest way to travel as far.In ancient poems,birds always played the lovely messager between lovers.To most people,bird is a sympol of postive,bright,romance,and an up-going spirit.
因为你提的要求比较模糊啦,赶紧给你写了2段.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
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